问题
解答题
(1)(-2xy2)2•(-x3y4)
(2)(a+b)(a+3b)
答案
(1)(-2xy2)2•(-x3y4)=4x2y4•(-x3y4)=-4x5y8;
(2)(a+b)(a+3b)=a2+3ab+ab+3b2=a2+4ab+3b2.
(1)(-2xy2)2•(-x3y4)
(2)(a+b)(a+3b)
(1)(-2xy2)2•(-x3y4)=4x2y4•(-x3y4)=-4x5y8;
(2)(a+b)(a+3b)=a2+3ab+ab+3b2=a2+4ab+3b2.