6*√(16X^2-36)=√(36-X^2)*4X
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6*√(16X^2-36)=√(36-X^2)*4X6*√(16X^2-36)=√(36-X^2)*4X6*√(16X^2-36)=√(36-X^2)*4X由题意有:16X²-36≥0即4X
6*√(16X^2-36)=√(36-X^2)*4X
6*√(16X^2-36)=√(36-X^2)*4X
6*√(16X^2-36)=√(36-X^2)*4X
由题意有:16X²-36≥0即4X²-9≥0且36-x²≥0
解4X²-9≥0得:x≥3/2或x≤-3/2;
解36-x²≥0即x²≤36得:-6≤x≤6
所以:-6≤x≤-3/2或3/2≤x≤6
原方程可化为:
12*√(4X²-9)=√(36-X²)*4X
即3√(4X²-9)=√(36-X²)*X
两边平方可得:
9(4X²-9)=x²(36-x²)
化简得:x^4=81=3^4
解得:x=3或x=-3,均满足-6≤x≤-3/2或3/2≤x≤6
所以原方程的解为:x=3或x=-3
已知√x²+8x+16+√x²-12x+36=10,化简√(2x+8)²+2|x-6|
6*√(16X^2-36)=√(36-X^2)*4X
√x^2+8x+16+√x^2-12x+36=10,求x的值
已知x=13/(4+根号3),求(x^4-6x^3-2x^2+18x+23)/(x^2-8x+15) 的值 禁止复制粘贴:x=13/(4+√3)=4-√3√3=4-x3=x²-8x+16x^2-8x+13=0,所以x^2-8x+15=2;x^4-6x^3-2x^2+18x+23=x^2(x^2-8x+13)+2x^3-15x^2+18x+23=2x(x^2-8x+13)+x^2-8x+23=x^2-8x+2
[(x+6)/(x-6)][(x-4)/(x+4)]^2+[(x-6)/(x+6)][(x+9)/(x-9)]^2=2(x^2+36)/(x^2-36)
xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1
化简:[√(x^2-6x+9)/x^2-x-12]*(x^3-16x)/(x^2-3x)-1/(x+3) {x>3}
解方程 式子 6-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+1 2x-1=5x-36-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+12x-1=5x-3
x^4-x^3-14x^2+6x+36=0 最后答案是(x-2)(x+3)(x-1-√7)(x-1+√7)=0求中间过程.
x²+4x-2=0,x²-4x+1=0,(x+√5)(x-√5)=20,x²+6x+5=8x+7,25(2x-1)²-16=0,
先化简再求值x^2+x-6/x^4-13x^2+36 (其中x=-3)
解方程:8x -4.5÷0.2=16 3(x+30)=6x+30 3-(5-2x)=x+273x-(67-84x)-14=76 15-(7-5X)=2X(11-3X) X+(X+10)+(x+8)=36×3 11×(4-x)+15×(4-X)=30
3*16^x+36^x=2*81^x
72/x-36/x^2-11=(6-x)^2
若x=√2,求代数式[(x^2-2x+4)/(√x^2-4x+4)]/[(x^3+8)/(x^2-4)]*[|6-x|/(x^2-5x-6)-[1/(x^2-x+1)]^-1的值
(6+x)×(2+x)=9+36
6.2x-x=41.6 ,2x +1.5x=17.5,x-.36x=16解,
(X/10)(X/10)=(6-X*X)/36