已知(a-2)^2 |b 1|=0,求5ab^2-[2a^2b-(4ab^2-2a^2b)]的值
问题描述:
已知(a-2)^2 |b 1|=0,求5ab^2-[2a^2b-(4ab^2-2a^2b)]的值
求解
答
(a-2)^2 +|b+1|=0
∴a-2=0
b+1=0
∴a=2
b=-1
5ab^2-[2a^2b-(4ab^2-2a^2b)]
=5ab^2-2a^2b+4ab^2-2a^2b
=9ab²-4a²b
=18+16
=34