(x/x2-9)-(1/x2+6x+9)计算
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(x/x2-9)-(1/x2+6x+9)计算
(x/x2-9)-(1/x2+6x+9)计算
(x/x2-9)-(1/x2+6x+9)计算
(x/x2-9)-(1/x2+6x+9)=x/(x+3)(x-3)-1/(x+3)²
=[x(x+3)-(x-3)]/(x-3)(x+3)²
=[x²+3x-x+3]/(x-3)(x+3)²
=(x²+2x+3)/(x-3)(x+3)²
(x2-x)2+6(x2-x)+9
(x/x2-9)-(1/x2+6x+9)计算
4x2-4x+1=x2+6x+9
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708
(x2+2x2)2-6(x2+2x)+9
x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x 化简
化简x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x
2( x2 +1/x2) - 9( x + 1/x) + 14 =
7/x2+x+1/x2-x=6/x2-1
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708等会就要 再次坐等
解方程4x2-4x+1=x2+6x+9 7x2-√6x-5=0
化简:根号(x2+6x+9)+根号(x2-2x+1)-根号(x2-4x+4)
-9x2+6x-1 因式分解
x2-9x+8
9x+6x2-3(x-2/3x2)其中x=-1
x2-6x+9/x2-4 x2-4x/x2-8x+16 2是平方 /是分数线
6x2-[-3x2-(x-1)] 化简
x2-1/x2-5x+6