Question

if x+2 is a factor of the polynomial 2x²+2ax+5x+10 then find a.​

Answer 1

Answer:

Given (x + a) is a factor of f ( x ) = 2 x 2 + 2 a x + 5 x + 10 . Let us now divide by x + a . Hence, the value of a is 2 .

Step-by-step explanation:

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Answer 2

Answer:

a=2

Step-by-step explanation:

x+2 is factor of equation.

So, x=2=0

or x= -2 should satisfy the equation

put x=-2 in equation:

2(-2)(-2) + 2a(-2) +5(-2)+10=0

8-4a-10+10=0

4a=8

a=2   (Answer)