Question

已知a^2+4ab+b^2+a^2b^2+1=0,求代数式a^3b+2z^2b^2+ab^3的值 今晚回答

Answer 1

a^2+4ab+b^2+a^2b^2+1=(a+b)^2+(ab+1)^2=0

即a+b=0,ab+1=0

a^3b+2a^2b^2+ab^3=ab（a+b)^2=0