Question

(x+a) is a factor of 2xsq+2ax+5x+10 find a

Answer 1

Answer:

a=-2

Explanation:

x+a=0

x=0-a

x=-a

p(x)=2x²+2ax+5x+10

p(-a)=(2*-a)²+2*a*-a+5*-a+10

     = 2a²-2a²+5a+10

    0=-5a+10

    5a+10=0

    5a=-10

    a=-10/5

   a=-2