Question

how do i do this problem from factored form 4x^2+28x+40

Answer 1

FACTOR OUT THE FOUR

Answer 2

4(x^2+5)(x+2)

Answer 3

(2*x)^2+2*2*x*7+(7^2)+40-(7^2)
Using formula (A+B)^2=A^2+2*A*B+B^2
[(2*x+7)^2]+40-49
[(2*x+7)^2]-9
[(2*x+7)^2]-(3)^2
using formula (a)^2-(b)^2=(a+b)*(a-b)
We get
[2*x+7+3}*[2*x+7-3]
[2*x+10]*[2*x+4]