Question
Simplify by using factoring:(2a+6b)(6b−2a)−(2a+6b)^2
Thanks for helping!
Thanks for helping!
Answers
Damon
(2a+6b) [ 6b -2a -2a - 6b ]
-4a (2a+6b)
-4a (2a+6b)
Reiny
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
(2a+6b)( (6b-2a) - (2a+6b) )
simplify the inside of my outside brackets and you are done
Damon
by the way, I only did step one.
Anonymous
But wouldn't (6b-2a) already be there? how could you group it?
Anonymous
the square is outside the parentheses
Damon
6 = 2*3