Question

if (X + a)is a factor of 2 X square + 2aX + 5 x + 10 find a.​

Answer 1

Answer:

Step-by-step explanation:

x+a is a factor of 2x²+2ax+5x+10

therefore f(-a)=0;

substituting values,

2(-a)²+2(a)(-a)+5(-a)+10=0

2a²-2a²-5a+10=0

-5a+10=0

therefore a=2