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受欢迎的代数 >

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

解答

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

解答

x = - 4

求解步骤

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

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

展开

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

展开

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

x^{2} + 2 x + 2 = x^{2} + x - 2

将

2

到右边

x^{2} + 2 x = x^{2} + x - 4

两边减去

x^{2} + x

x^{2} + 2 x - (x^{2} + x) = x^{2} + x - 4 - (x^{2} + x)

化简

x = - 4

作图

流行的例子

\frac{3}{2} b + 5 = 20 - b

(x-5)/7 =(x-8)/(11)

\frac{x - 5}{7} = \frac{x - 8}{11}

4 b - 8 = 10 - 2 b

7 + x = 18

18 x - 5 = 3 (6 x - 2)