(a+3)²+|b-4|=0,所以a+3=0,b-4=0,a=-3,b=4(a+b)-(a-b)²=[(-3)+4)]-[(-3)-4]²=1-(-7)²=1-49=-48
(a+3)²+|b-4|=0,a+3=0b-4=0a=-3,b=4(a+b)-(a-b)²=1-49=-48