问题
解答题
(1)计算:(-1)2÷
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x). |
答案
(1)(-1)2÷
1 |
2 |
3 |
4 |
1 |
2 |
=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.
(1)计算:(-1)2÷
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x). |
(1)(-1)2÷
1 |
2 |
3 |
4 |
1 |
2 |
=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.