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電子課本網(wǎng) 第27頁

第27頁

信息發(fā)布者:
?$4a-2b+6c$?
?$-5a+2x-3$?
?$3x+4y-7z-3$?
?$-3a^3-2x2+5x+1$?
?$x^2-2xy+y^2$?
?$-b+c$?
?$4y2-3x2$?
?$3p+1$?
?$=a-2a+2$?
?$=-a+2$?
?$=-5x-y-6x+9y$?
?$=-11x+8y$?
?$=2x^2-7-x-3x-4x^2$?
?$=-2x^2-4x-7$?
?$=-3a^2+2a-1+a^2-5a+7$?
?$=-2a^2-3a+6$?
?$=a^2-3[a^2-2a^2+2a+1]$?
?$=a^2-3a^2+6a^2-6a-3$?
?$=4a^2-6a-3$?
?$=3a^2b-2[ab^2-2a^2b+4ab^2]$?
?$=3a^2b-2ab^2+4a^2b-8ab^2$?
?$=7a^2b-10ab^2$?
?$=5a^2-[3a-2a+3+4a^2]$?
?$=5a^2-3a+2a-3-4a^2$?
?$=a^2-a-3$?
?$=2a^2b-6ab^2-6ab^2+\frac {5}{2}a^2b$?
?$=\frac {9}{2}a^2b-12ab^2$?