Question

If one factor of x3+4x2+8x+a is (x+2) then find value of a

Answer 1

$x {}^{3} + 4x {}^{2} + 8x + a$

x + 2 is a factor that means -2 will satisfy the equation.
$(- 2) {}^{3} + 4( - 2) {}^{2} + 8( - 2) + a = 0$

-8 + 16 - 16 + a = 0

a - 8 = 0

a = 8


Thanks

Answer 2

according to your question

step by step solution is there