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受欢迎的代数 >

(x-1)^3+8-x^3+3x(x+2)=17

解答

(x - 1)^{3} + 8 - x^{3} + 3 x (x + 2) = 17

解答

x = \frac{10}{9}

+1

十进制

x = 1.11111 \dots

求解步骤

(x - 1)^{3} + 8 - x^{3} + 3 x (x + 2) = 17

将

8

到右边

(x - 1)^{3} - x^{3} + 3 x (x + 2) = 9

展开

(x - 1)^{3} - x^{3} + 3 x (x + 2) : 9 x - 1

9 x - 1 = 9

将

1

到右边

9 x = 10

两边除以

9

x = \frac{10}{9}

作图

流行的例子

x + 1 = \frac{21}{2}

solvefor x,((d^3*x))/((d*t^3))-x=0

so l v e f or x, \frac{( d ^{3} \cdot x )}{( d \cdot t ^{3} )} - x = 0

(2(3x-1)+7)/2 =5x-2(2x-7)

\frac{2 ( 3 x - 1 ) + 7}{2} = 5 x - 2 (2 x - 7)

-2x^2=(5-x)(2x-2/5)

- 2 x^{2} = (5 - x) (2 x - \frac{2}{5})

7 d m o d^{20} = 1