Question

15(a - 2b)2 - 16(a - 2b) - 15​

Answer 1

15(a-2b)^2 - 16(a-2b) - 15

= 15(a^2 + 4b^2 - 4ab) -16(a-2b) - 15

= 15a^2 + 60b^2 -60ab - 16a^2 +32b - 15

= -a^2 +92b^2 -60ab -15

Answer 2

Answer:

hope it helps you..............