(2x+1)(3x-2)

显示全部楼层 · 2009-4-5 19:03:19

(2x+1)(3x-2)
(4a^2+2a+1)(2a-1)
(2x-3y)(2x+3y)
(3x-1/2)(-1/2-3x)(-1/4-9x^2)
(-a-2b)^2
(2a-3b+1)^2
2m^2(-2mn)*(-1/2m^2n^3)
(-4a^2b)*(-2ab)^3*(1/8ab)
-3x(4x^2-1/3x+2)
(-2/3a)(1/2a^2+1/6a-1/4)

千问 · 2009-4-5 19:03:19

(2x+1)(3x-2) =6x^2-4x+3x-2=6x^2-x-2(4a^2+2a+1)(2a-1) =(2a)^3-1=8a^3-1(2x-3y)(2x+3y) =4x^2-9y^2(3x-1/2)(-1/2-3x)(-1/4-9x^2) =-(9x^2-1/4)(-1/4-9x^2) =81x^2-1/16(-a-2b)^2 =a^2+4ab+4b^2(2a-3b+1)^2 =4a^2+9b^2+1-12ab+4a-6b2m^2(-2mn)*(-1/2m^2n^3) =2m^5n^4(-4a^2b)*(-2ab)^3*(1/8ab) =2a^6b...

千问 · 2009-4-5 19:03:19

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