Question

If (x+a) is a factor of the polynomial 2x²+2ax+5x+10, find the value of a.​

Answer 1

Step-by-step explanation:

the step - by - step explanation is here:

firstly as x+a is a factor of the eq then "-a" is the zero of the eq.

on substituting :

2(-a)^2 + 2a(-a) + 5(-a) + 10 = 0

2a^2 - 2a^2 - 5a + 10 = 0

-5a + 10 = 0

-5a = -10

a = -10/-5

a = 2

Hence a is equal to 2