Question

X+a is a factor of 2x^+2ax+5x+10find a

Answer 1

Since x+a is a factor of the given algebraic expression, the answer will be 0

Putting value of x = -a, we will get 5a = 10

Hence, a = 2

Answer 2

Answer:

x-a=0

x=-a

P(x)=2x^2+2ax+5x+10

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

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

=-5a+10=0

=-5a=-10

=a=-10/-5

=a=2