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Zeros Calculator

Zeros Calculator


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An online zeros calculator determines the zeros (exact, numerical, real, and complex) of the functions on the given interval. The zeros of the function calculator compute the linear, quadratic, polynomial, cubic, rational, irrational, quartic, exponential, hyperbolic, logarithmic, trigonometric, hyperbolic, and absolute value function. Read on to understand more about how to find zeros of a function. Let’s start with some basics!

What are Zeros of a Function?

In mathematics, the zeros of real numbers, complex numbers, or generally vector functions f are members x of the domain of ‘f’, so that f (x) disappears at x. The function (f) reaches 0 at the point x, or x is the solution of equation f (x) = 0.

Additionally, for a polynomial, there may be some variable values for which the polynomial will be zero. These values ​​are called polynomial zeros. They are sometimes called the roots of polynomials. We find the zeros or roots of a quadratic equation to find the solution of a given equation.

The standard form of the polynomial in x is \( a_nx^n + a_{n-1}x^{n-1} +….. + a_1x + a_0 \), where \( x_n, x_{n-1},… .., x_1, x_0 \) are constants, \( a_n ≠ 0 \), and n is an integer.

For example, algebraic expressions like \( \sqrt {a + a + 5, a^2 + 1 / a^2} \) are not polynomials, because all exponents of x in the expression are not integers.

Zeros Formula:

Assume that P (x) = 9x + 15 is a linear polynomial with one variable.

Let’s the value of ‘x’ be zero in P (x), then  

\( P (x) = 9k + 15 = 0 \)

So, k \( = -15/9 = -5 / 3 \)

Generally, if ‘k’ is zero of the linear polynomial in one variable P(x) = mx + n, then

P(k) = mk + n = 0  

k = – n / m

It can be written as,

Zero polynomial K = – (constant / coefficient (x))

However, an online Binomial Theorem Calculator helps you to find the expanding binomials for the given binomial equation.

How to Find the Zeros of a Function?

Finding the zeros of a function is as simple as isolating ‘x’ on one side of the equation or editing the expression multiple times to find all the zeros of the equation. Generally, for a given function f (x), the zero point can be found by setting the function to zero. The x value that indicates the set of the given equation is the zeros of the function. To find the zero of the function, find the x value where f (x) = 0.

In simple words, the zero of a function can be defined as the point where the function becomes zeros. The degree of the function is the maximum degree of the variable x.

·         A function of degree 1 is called a linear function.

The standard form is ax + b,

Where, a and b are real numbers, and a ≠ 0.

7x + 23 is an example of linear function.

·         The function with degree 2 is called the quadratic function.

The standard form is \( ax^2 + bx + c \),

Where, a, b, and c are real numbers and a ≠ 0.

\( X^2 + 10x + 12 \) is an example of a quadratic function.

·         The degree 3 of a function is called the cubic function.

The standard form is \( ax^3 + bx^2 + cx + d \),

Where a, b, c, and d are real numbers, and a ≠ 0.

\( X^3 + 44x^2 + 23x + 2 \) is an example of a cubic function.  


\( Y^6 + 23y^5 + 13y^4 + 32y^3 + 65y^2 + y + 22 \) is a function of degree 6 of y.

Key points:

·         All linear functions have only one zero.

·         The zero point of a function depends on its degree.

However, a handy Inflection Point Calculator to find points of inflection and concavity intervals of the given equation.


If the degree of the function is \( x^3 + m^{a-4} + x^2 + 1 \), is 10, what does value of ‘a’?


The degree of the function P(m) is the maximum degree of m in P(m).

Therefore, the complex zeros calculator takes the \( m^{a-4} = m^4 \)

$$ a-4 = 10, a = 4 + 10 = 14 $$

Hence, the value of ‘a’ is 14.


Calculate the sum and zeros product of the quadratic function \( 4x^2 – 9 \).


The quadratic function is \( 4x^2 – 9 \)

The zero calculator can be writing the \( 4x^2 – 9 \) value as \( 2.2x^2-(3.3) \)

Where, it is (2x + 3) (2x-3).

To find the zeros of a function, zero calculator set the above expression to 0

$$ (2x + 3) (2x-3) = 0 $$

$$ 2x + 3 = 0 $$

$$ 2x = -3 $$

$$ X = -3/2 $$

Similarly, the zeros of a function calculator takes the second value 2x-3 = 0

$$ 2x = 3 $$

$$ x = 3/2 $$

So, zeros of the function are 3/2 and -3/2

Therefore, zero finder take the Sum and product of the function:  

Zero sum = \( (3/2) + (-3/2) = (3/2) – (3/2) = 0 \)

Zero product = \( (3/2). (-3/2) = -9/4 \).

How Zeros Calculator Works?

An online zero calculator compute the zeros for several functions on the given interval by following these guidelines:


·         Enter an equation to find zeros of a function.

·         Hit the calculate button to see the results.


·         The real zeros calculator finds the exact and real values of zeros and provides the sum and product of all roots.


How do you find the roots of a polynomial?

The zeros of a polynomial calculator can find the root or solution of the polynomial equation P (x) = 0 by setting each factor to 0 and solving for x.

Are zeros and roots the same?

According to the rule of thumbs: zero refers to a function (such as a polynomial), and the root refers to an equation.

What does real zeros mean?

The real zero of the function is the real number when the function value is zero. If f (r) = 0, then the real number r is the root of the function f.


Use this online zeros calculator to find the roots of the given expression. Find zeros can be time-consuming, there might be lots of possible roots and for each term, you should check whether or not it’s an actual zero(root). Fortunately, there is our zeros solver, which can do all these calculations for you quickly.


From the source of Wikipedia: Zero of a function, Polynomial roots, Fundamental theorem of algebra, Zero set.

From the source of Study for Mathematics: find the zeros of a function, find zeros of a quadratic function, zeros of a polynomial function.

From the source of Lumen Learning: Find zeros of a polynomial function, Analysis of the Solution, FUNCTION WITH REPEATED REAL ZEROS.