作业帮10.5 0.7x=x解方程
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3.1x-x=7解方程2.1x=7x=7/2.1=70/21=10/33分之10施主,我看你骨骼清奇,器宇轩昂,且有慧根,乃是万中无一的武林奇才.潜心修习,将来必成大器,鄙人有个小小的考验请点击在下答
x(x-7)-8(x-7)=0(x-8)(x-7)=0x=8或7100好评,
(x²-x+4)x-(x-1)(x²+2)=x+7x³-x²+4x-x³+x²-2x+2=x+72x+2=x+72x-x=7-2x=5
【解法一】【解法二】5x(x+7)(x+4)=5x(x^2+11X)5x(x²+11x+28)-5x(x²+11x)=05x^3+55x^2+140x=5x^3+55x^25x(x
7x-2x+3x=365x+3x=368x=36x=4.5
/>因为：x-5/x-6+x-8/x-9=x-7/x-8+x-6/x-7,所以：1+1/(x-6)+1+1/(x-9)=1+1/(x-8)+1+1/(x-7)即：1/(x-6）+1/(x-9)=1/(
-2x=-8x=4再答：谢谢
移项5X-2X+X=7(5-2+1)X=74X=7X=7÷4X=1又4分之3
7x(x+8)+5x=2607x²+56x+5x-260=07x²+61x-260=0判别式=61²+4×7×260=11001x=(-61±√11001)/14再问：用
0.3x+7x-15%x=21.250.3x+7x-0.15x=21.257.15x=21.25715x=2125143x=425x=425/143
（7-2+3）X=368X=36X=9/2
7x=6x-4x7x=2xx=0
(1+7)x=168=8x=167x=167÷8x=20.875
2(x-3)(x+5)=x^2+(x+2)(x-2)+(x+7)2(x^2+2x-15)=x^2+x^2-4+x+72x^2+4x-30=2x^2+x+33x=33x=11
0或44/7
解题思路：高次方程的解法分解因式解题过程：
0.3x+7x-0.25x=21.257.05x=21.25705x=2125x=425/141
x²-10x-24=0（x-12）（x+2）=0x=12或x=-2
x*x是指x²还是指x的x次方?再问：ָx²再答：x²-7x+66=0��=7²-4X66