Simplify by using factoring:(2a+6b)(6b−2a)−(2a+6b)^2

Question

Thanks for helping!

Answer 1

(2a+6b) [ 6b -2a -2a - 6b ]
-4a (2a+6b)

Answer 2

Notice that (2a + 6b) is a common factor, so ...

(2a+6b)( (6b-2a) - (2a+6b) )

simplify the inside of my outside brackets and you are done

Answer 3

by the way, I only did step one.

Answer 4

But wouldn't (6b-2a) already be there? how could you group it?

Answer 5

the square is outside the parentheses

Answer 6

6 = 2*3