计算与化简:(-2x^2y^3)^2(xy)^3①(-2x^2y^3)^2(xy)^3 ②(2x-3y)^2-(y+3x)(3x-y)③-2a^2(1/2ab+b^2)-5a(a^2b-ab^2) ④9(x+2)(x-2)-(3x-2)^2⑤(a+b-c)(a-b+c) ⑥(1)先化简再求值:(2x-1)^2-(3x+1)(3x-1)+5x(x-1),其中x=-1/3(2)先
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计算与化简:(-2x^2y^3)^2(xy)^3
①(-2x^2y^3)^2(xy)^3 ②(2x-3y)^2-(y+3x)(3x-y)
③-2a^2(1/2ab+b^2)-5a(a^2b-ab^2) ④9(x+2)(x-2)-(3x-2)^2
⑤(a+b-c)(a-b+c)
⑥(1)先化简再求值:(2x-1)^2-(3x+1)(3x-1)+5x(x-1),其中x=-1/3
(2)先化简再求值:(x+2y)(x-2y)-(2x-y)(-2x-y),其中x=8,y=-8
上面题目不要了!
⑦(x-2)+x^(2-x) ⑧(x^2+y^2)^2-4x^2y^2
⑨-8a^3b^2+12ab^3c-6a^2b ⑩3a(x-y)+9(y-x)
⑾(2m-3n)^2-(2m-3n) ⑿16mn^4-m
12题了.前面的会了.今天内追加.
①4x^7y^9
②-5x^2+9y^2-12xy
③-6a^3b+3a^2b^2
④12x-4
⑤a^2-b^2-c^2+2bc
其他明天再帮你.
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