Question

Find the zeroes of polynomials of quadratic polynomials is x2-2x-8

Answer 1

Step-by-step explanation:

x2-2x-8=0

x2-2x+4x-8=0

X(x-2)+4(x-2)

(x-2)&(x+4)

Therefore zeroes are x=2and -4

Answer 2

Hi,

Here is your answer

Given:

p(x)=x²-2x-8

To Find:

The zeros of the polynomial

Solution:

Finding the zeros by splitting the middle term method,

x²-2x-8=0

x²-4x+2x-8=0

x(x-4)+2(x-4)=0

(x-4)(x+2)=0

Either

x-4=0

x=4

OR

x+2=0

x= -2

Hence the zeros of the polynomial are 4 and -2

Notes:

The zeros of a quadratic polynomial can be found out by

• Factorization method
• Splitting the middle term
• Completing the square method

Hope this helps you.