Question

Решите пожалуйста! 1) a (a-2b)-(3b+a)^2 2)(m+8)^2-(m-2n)(m+2n)

Answer 1

1. a(a-2b)-(3b+a)²= a²-2ab-9b²-6ab-a²=-9b²-8ab
2. (m+8)²-(m-2n)(m+2n)= m²+16m+64-m²+4n²=64+16m+4n²