计算:(1)(?14)?2?(?1)2006+(23)11×(?32)12;(2)|?3|+(?1)2013×(π?3)0?(?12)?3;(3)(y-2+x)2
计算:(1)(?14)?2?(?1)2006+(23)11×(?32)12;(2)|?3|+(?1)2013×(π?3)0?(?12)?3;(3)(y-2+x)2;(4)...
计算:(1)(?14)?2?(?1)2006+(23)11×(?32)12;(2)|?3|+(?1)2013×(π?3)0?(?12)?3;(3)(y-2+x)2;(4)(-2x+y-z)(-y-2x-z);(5)(14a2b)?(?2ab2)2÷(?0.5a4b5);(6)(x-y)-(-x-y)(x-y)+(x+y)2.
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(1)原式=16;
(2)原式=3+1×1+8
=3+1+8
=12;
(3)原式=(y-2)2+2x(y-2)+x2
=y2-4y+4+2xy-4x+x2;
(4)原式=[(-2x-z)+y][(-2x-z)+y]
=(-2x-z)2-y2
=(2x+z)2-y2
=4x2+4xz+z2-y2;
(5)原式=
a2b?4a2b4÷(-
a4b5)
=a4b5÷(-
a4b5)
=-2;
(6)原式=x-y-y2-x2+x2+2xy+y2.
=2xy+x-y.
(2)原式=3+1×1+8
=3+1+8
=12;
(3)原式=(y-2)2+2x(y-2)+x2
=y2-4y+4+2xy-4x+x2;
(4)原式=[(-2x-z)+y][(-2x-z)+y]
=(-2x-z)2-y2
=(2x+z)2-y2
=4x2+4xz+z2-y2;
(5)原式=
1 |
4 |
1 |
2 |
=a4b5÷(-
1 |
2 |
=-2;
(6)原式=x-y-y2-x2+x2+2xy+y2.
=2xy+x-y.
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