Question

please answer the question
1.If x+a is a factor of 2x^2+2ax+5x+10 then the value 'a' is _________​

Answer 1

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