题目内容
(1)计算:(-1)2÷
+(-2)3×
-(
)0;
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).
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(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).
(1)(-1)2÷
+(-2)3×
-(
)0,
=2-6-1,
=-5;
(2)[(2x-y)(2x+y)+y(y-6x)]÷(2x),
=(4x2-y2+y2-6xy)÷2x,
=(4x2-6xy)÷(2x),
=2x-3y.
故答案为-5、2x-3y.
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=2-6-1,
=-5;
(2)[(2x-y)(2x+y)+y(y-6x)]÷(2x),
=(4x2-y2+y2-6xy)÷2x,
=(4x2-6xy)÷(2x),
=2x-3y.
故答案为-5、2x-3y.
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