Simple Guide on How to Calculate Zeros of a Function

Algebra is the branch of mathematics that is subjected to study graphical patterns of various functions and equations. But when it comes to plotting these graphs, you need to determine zeros. This is because zeros gives us an idea of points in any of the four quadrants that further assists in plotting functions’ graphs. Calculating zeros of simple functions may seem quite simpler. But when it comes to complicated equations, the task becomes a little bit tough. But calculator-online.net has made it easy as well.

Yes, it is true! Just provide your functions in the zeros calculator developed by the site and it will readily figure out the zeros of it. How cool! But instead of instant calculations done by this real zero calculator, we must take a look at the manual method of zeros determination.

What are Zeros of a Function?

They are the numbers that equal the value of an algebraic function to zero.

How to Find Zeros?

Calculating zeros is no more a daunting chore if you use the zeros calculator by calculator-online.net. But when it comes to the manual computations, you can go through the examples below to understand these better!

Problem # 01: (Linear Equation)

Determine the zero of the linear equation given as under:

x+2y=10

Solution:

Solving for x first:

x=10-2y

Put this value of x in the original equation:

x+2y=10

10-2y+2y=10

10=10

As L.H.S=R.H.S, the value of x is the root of the given original equation. You can also verify the results by utilizing the best zeros calculator. It will increase the chances of accuracy in milliseconds.

Now solving for y as under:

x+2y=10

y=10-x/2

Put this value in original linear equation:

x+2y=10

x+2(10-x/2)=10

x+2/2(10-x)=10

x+(10-x)=10

x+10-x=10

10=10

As again L.H.S=R.H.S, the value of y is the root of the equation as well.

Check:

Problem # 02 (Quadratic Equation)

Calculate the zeros of the following second degree equation:

x2+2x+4=0

Now there are a couple of ways to find zeros for a quadratic equation which include:

Method 1: Factorization

x2+2x+4=0

x2+2x+2x+4=0

x(x+2)+2(x+2)=0

(x+2)=0 & (x+2)=0

x=-2, x=-2

If you could use the zeros calculator, it will automatically performs all of these steps and display you with results.

Method 2: Quadratic Formula

x2+2x+4=0

Here the coefficients are as follows:

a=1, b=2, c=4

The quadratic formula is given as:

x=+-b2-4ac/2*1

x=+-(2)2-4*1*4/2*1

x=+-4-16/2

x=+--12/2

x=+-12/2 & x=--12/2

Which are the imaginary roots of the given quadratic equation. To determine the exact results of the roots, you may better let the complex finding zeros calculator do that for you in seconds.

YouTube Video Tutorial: Finding the Zeros of any Algebraic Function

See:

Conclusion

You have learnt how to calculate zeros in any function or equation. As you have seen in the illustrations above, there many methods you can use to calculate the zeros of a quadratic function manually, especially the one that has 2 terms. You either use the method of factorization, or you apply the quadratic formula. Alternatively, you can use the free zeros calculator. Enjoy!