问题描述:
化简代数式的几道题
3(x-1)-(x-5)
2(x^2-y^2)-3(x^2-2y^2)
(x+y)+3(x-y)-4(x+y-2)
(2x^2-1+3x)-4(x-x^2+1)
-3a^2+(3a-5a^2)-1/2(4a^2+6a)
(8mn-3m^2)-5mn-2(3mn-2m^2)
3(2x^2-y^2)-2(3y^2-2x^2)
(8x^3-3x^2+3)-(9x^3-4x^2+5)
-(-4ab+b^2)-2(2ab-b^2)
辛苦了.
3(x-1)-(x-5)
2(x^2-y^2)-3(x^2-2y^2)
(x+y)+3(x-y)-4(x+y-2)
(2x^2-1+3x)-4(x-x^2+1)
-3a^2+(3a-5a^2)-1/2(4a^2+6a)
(8mn-3m^2)-5mn-2(3mn-2m^2)
3(2x^2-y^2)-2(3y^2-2x^2)
(8x^3-3x^2+3)-(9x^3-4x^2+5)
-(-4ab+b^2)-2(2ab-b^2)
辛苦了.
问题解答:
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