[2(x-1)^2+(x-1)^3]÷(1-x)
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[2(x-1)^2+(x-1)^3]÷(1-x)
[2(x-1)^2+(x-1)^3]÷(1-x)
=[2(1-x)^2-(1-x)^3]÷(1-x)
=2(1-x)-(1-x)^2
=1-x^2
=[2(1-x)^2-(1-x)^3]÷(1-x)
=2(1-x)-(1-x)^2
=1-x^2
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x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x-2/x-1÷(x+1-3/x-1)
1+x+x^2+x^3+.+x^99+x^100
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x^2-x/x+1÷x/x+1 ;x^2+6x+9/x^2-9÷x+2/x-3;2/a÷4/a
x(x+1)^3+x(x+1)^2+x(x+1)+x+1因式分解
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就这两道题,1、|x+1|+|x-2||x+1|+|x-2|+|x-1||x+2|+|x-2|+|x+3|+|x-1||