Question

4( a+2b )2 - 9 (a-b)2​

Answer 1

Answer:

Step-by-step explanation:

4(a+2b)2-9 (a-b)2

(4a+8b) x -7(a-b)2

(4a+8b) x (7a-7b) x 2

4a(7a-7b) + 8b(7a-7b) x 2

(28a2 - 28ab + 56ab - 56b2) x 2

(28a2 +28ab - 56b2) x 2