(x^2-2x+3)^2=4x^2-8x+17写出详细过程!
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(x^2-2x+3)^2=4x^2-8x+17写出详细过程!
(x^2-2x+3)^2=4x^2-8x+17写出详细过程!
(x^2-2x+3)^2=4x^2-8x+17写出详细过程!
((x-1)^2+2)^2=4(x-1)^2+13
令u=(x-1)^2, (u>0)可得
(u+2)^2=4u+13
u^2+4u+4=4u+13
u^2=9
u>0 所以u=3
(x-1)^2=3
x=1+/-[根号3]
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x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
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解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
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