X-{[(X-2 7X)*1 5] 2 7X}=124

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X-{[(X-2 7X)*1 5] 2 7X}=124
化简|x-5|+|x+10|-|x-15|,

当X>15时,原式=X-5+X+10-(X-15)=X-5+X+10-X+15=X+20当5

(x

展开式的通项为Tr+1=(−12)rCr10x30−5r令30-5r=0得r=6故展开式的常数项为(−12)6C610=10532故答案为10532

求化简:(x^2+3x+9)/(x^2-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)

(X²+3X+9/X²-27)+(6X/9X-X²)-(X-1/6+2X)=X²+3X+9/X²-27+6/9-X²-X+1/6+2X=9/

化简(x^2+3x+9)/(x^3-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)

是9x-x³原式=(x²+3x+9)/(x-3)(x²+3x+9)-6x/x(x-3)(x+3)-(x-1)/2(x+3)=1/(x-3)-6/(x-3)(x+3)-(x

(X+X)+(X-X)+(X*X)+(X/X)=100

(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问:请问X(X+2)=99解为什么就等于9了呢没看懂再答:换成算术法你就明

(x+1)(x+2)(x+5)(x+7)+15 因式分解

(x+1)(x+3)(x+5)(x+7)+15=[(x+1)(x+7)][(x+3)(x+5)]+15=(x^2+8x+7)(x^2+8x+15)+15=(x^2+8x+7)[(x^2+8x+7)+8

分解因式 x*-2x-27x-44x+7

(X^2-7X+1)(X^2+5X+7)设(X^2+aX+1)(X^2+bX+7),然后求未知数

X/15 + X/12 + X/10 = 1365,求X,

同时乘6060×(x/15+x/12+x/10)=1365×604x+5x+6x=8190015x=81900x=81900÷15x=5460很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选

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|x|

(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x

主要是考察因式分解这方面的技能啊![(2x²-5x+2)/(6x²+13x+6)]*[(6x²-5x-6)/(6x²-17x+10)]*[(12x²+

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

设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=

x

x

因式分解 (x+1)(x+3)(x+5)(x+7)+15

(x+1)(x+3)(x+5)(x+7)+15=[(x+1)(x+7)][(x+3)(x+5)]+15=(x^2+8x+7)(x^2+8x+15)+15=(x^2+8x+7)[(x^2+8x+7)+8

(25/X)X(30/X)= 15/X怎么算

中间是乘号吗?750/x²=15/x显然x不等于0则两边乘x²750=15xx=50

因式分解 (x+1)(x+2)(x+5)(x+7)+15

(x+1)(x+3)(x+5)(x+7)+15=[(x+1)(x+7)][(x+3)(x+5)]+15=(x^2+8x+7)(x^2+8x+15)+15=(x^2+8x+7)[(x^2+8x+7)+8

(x-22)+(x-24)+(x-27)+(x-20)=x

(x-22)+(x-24)+(x-27)+(x-20)=xx-22+x-24+x-27+x-20=x4x-93=x4x-x=933x=93x=31

换元法 (x+1)(x+3)(x+5)(x+7)+15

(x+1)(x+3)(x+5)(x+7)+15=(x+1)(x+7)(x+3)(x+5)+15=(x²+8x+7)(x²+8x+15)+15=(x²+8x)²+

化简:[x+1 -(15/x-1)] * (x-4/x-1)

*应该是÷原式=[(x+1)(x-1)-15]/(x-1)*(x-1)/(x-4)=(x²-16)/(x-1)*(x-1)/(x-4)=(x+4)(x-4)/(x-1)*(x-1)/(x-4

x+x=x+15

2x等于x+15x等于15

,x

解题思路:同学你好,本题利用同角三角函数的基本关系求解,具体过程见解析解题过程: