15x-(x-3)=3
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15x-(x-3)=315x-(x-3)=315x-(x-3)=315x-(x-3)=315x-x+3=314x=3-314x=0x=015x-x+3=314x=0x=015x-x+3=314x=3-
15x-(x-3)=3
15x-(x-3)=3
15x-(x-3)=3
15x-(x-3)=3
15x-x+3=3
14x=3-3
14x=0
x=0
15x-x+3=3
14x=0
x=0
15x-x+3=3
14x=3-3
14x=0
x=0
x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x)
X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一
3X+30+X+X-15=?
13x-15x+x=-3
3x-x(10-x)=15
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
证明(x+1)(X+3)(x+5)(x+7)+15=(X+8x)+22(x+8x)+120
计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?
解方程(x-3/x)-(3-x/x+1)=5x-15/2x+2
x(-6x-9)-x(-8x-15)+2x(3-x)=?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程
3x-/x+15/
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值紧急,,明天有用,,
解方程(x^2-10x+15)/(x^2-6x+15)=3x/(x^2-8x+15)
3x*x=1600+x*x-80x
(X+1)X(X+2)X(X+3)=504
2x²-6x=5x-15(2x-1)(x+1)=(3x+1)(x+1)
(x-2)(x²-6x-9)-x(x²-2x-15),其中x=1/3