Question

please can someone tell me if i am doing these right and are these 2 correct? find the product
1. problem is: (x-5)(x^2+5x+25)
my answer is: x^3-125

2. problem: (4X+4Y)^2
my answer is: 16x^2+32xy-16y^2

Answer 1

16x^2+32xy+16y^2

The first one is right.

Answer 2

The last one should be +16Y^2

Answer 3

where did i go wrong on the second one?

Answer 4

\[
(a+b)^2 = a^2 + 2 a b + b^2
\]

Answer 5

you are right thank you i see how it comes to be i appreciate your help