Question

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

Answer 1

Step-by-step explanation:

x+a = 0

x = -a

2x^2 +2ax + 5x +10=0

2 × (-a)^2 +2×a ×(-a)+5×(-a) +10=0

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

10=5a

a=2