问题 填空题

计算:(4x3y34-3(x4y43=______;(4x+2y)(x+y)=______.

答案

(4x3y34-3(x4y43 

=44(xy)12-3(xy)12

=(256-3)x12y12

=253x12y12

(4x+2y)(x+y) 

=4x2+4xy+2xy+2y2

=4x2+6xy+2y2

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