Question

find the value of 'a' if x+a is factor ( zero) of polynomials 2x² + 2ax + 5x + b​

Answer 1

see this attachment

hope this helps you.

Answer 2

Step-by-step explanation:

f(x)=2x 2

+2ax+5x+10

g(x)=x+a

x+a=0

x=−a

f(−a)=2(−a)

2

+2a(−a)+5(−a)+10

⇒+2a

2

−2a

2

−5a+10=0

⇒5a=10

⇒a=

5

10

∴a=2