问题
计算题
计算:(1)(2x+y﹣z)2;(2)(x4y+6x3y2﹣x2y3)÷(3x2y)
答案
解:(1)(2x+y﹣z)2,
=(2x+y)2﹣2z(2x+y)+z2,
=4x2+y2+z2+4xy﹣4xz﹣2yz;
(2)(x4y+6x3y2﹣x2y3)÷(3x2y),
=x4y÷3x2y+6x3y2÷3x2y﹣x2y3÷3x2y,
=.
计算:(1)(2x+y﹣z)2;(2)(x4y+6x3y2﹣x2y3)÷(3x2y)
解:(1)(2x+y﹣z)2,
=(2x+y)2﹣2z(2x+y)+z2,
=4x2+y2+z2+4xy﹣4xz﹣2yz;
(2)(x4y+6x3y2﹣x2y3)÷(3x2y),
=x4y÷3x2y+6x3y2÷3x2y﹣x2y3÷3x2y,
=.