计算(1).(?13)?1+(?3)2×(π?2)0+(12)?3(2)(?6xy2)2(?13xy+32y2?x2)(3)(x+2y)2(x-2y)2(4)(a
计算(1).(?13)?1+(?3)2×(π?2)0+(12)?3(2)(?6xy2)2(?13xy+32y2?x2)(3)(x+2y)2(x-2y)2(4)(a-b+2...
计算(1).(?13)?1+(?3)2×(π?2)0+(12)?3(2)(?6xy2)2(?13xy+32y2?x2)(3)(x+2y)2(x-2y)2(4)(a-b+2)(a+b+2)(5)(13)?2+(?19)0+(?5) 3÷(?5)2; (6)(-2a)3-(-a)?(3a)2.
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(1).(?
)?1+(?3)2×(π?2)0+(
)?3,
=-3+9×1+
,
=-3+9+8,
=14;
(2)(?6xy2)2(?
xy+
y2?x2),
=36x2y4(-
xy+
y2-x2),
=-12x3y5+54x2y6-36x4y4,
(3)(x+2y)2(x-2y)2,
=(x2-4y2)2,
=x4+16y4-8x2y2,
(4)(a-b+2)(a+b+2),
=(a+2-b)(a+2+b),
=(a+2)2-b2,
=a2+4a+4-b2,
(5)(
)?2+(?
)0+(?5) 3÷(?5)2,
=9+1+(-5),
=5;
(6)(-2a)3-(-a)?(3a)2,
=-8a3-(-9a3),
=a3.
1 |
3 |
1 |
2 |
=-3+9×1+
1 | ||
|
=-3+9+8,
=14;
(2)(?6xy2)2(?
1 |
3 |
3 |
2 |
=36x2y4(-
1 |
3 |
3 |
2 |
=-12x3y5+54x2y6-36x4y4,
(3)(x+2y)2(x-2y)2,
=(x2-4y2)2,
=x4+16y4-8x2y2,
(4)(a-b+2)(a+b+2),
=(a+2-b)(a+2+b),
=(a+2)2-b2,
=a2+4a+4-b2,
(5)(
1 |
3 |
1 |
9 |
=9+1+(-5),
=5;
(6)(-2a)3-(-a)?(3a)2,
=-8a3-(-9a3),
=a3.
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