Question

已知|a+1|+(b-2)²=0,求(a+b)的2d2次方+a的2d3次方的值 帮忙~~

完全没看懂2d2和2d3啥意思

Answer 1

∵|a+1|+(b-2)²=0,
∴a+1=0 b-2=0
故a=-1 b=2
∴(a+b)的2d2次方+a的2d3次方
=(-1+2)的2d²+(-1)的2d³
=1-1
=0