Please see the pic, I'd solved in it.
2+2 is 4 - 1 is 3 QUICK MATHS
Answer:
-8a(a+3b)
Step-by-step explanation:
(2a+6b)(6b−2a)−(2a+6b)^2
(2a+6b) {(6b−2a)−(2a+6b)(2a+6b)}
2(a+3b) (6b-2a-2a-6b)
2(a+3b) (-4a)
-2(a+3b) x 4a
-2 x 4a (a+3b)
-8a(a+3b)
EDIT: MY ANSWER ASSUMED CONSTANT ACCELERATION - CHANGING IT NOW
