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受欢迎的代数 >

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

解答

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

解答

x = 11

求解步骤

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

乘开

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

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

展开

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

2 x - 3 x^{2} - 3 = - 3 x^{2} + x + 8

将

3

到右边

2 x - 3 x^{2} = - 3 x^{2} + x + 11

两边减去

- 3 x^{2} + x

2 x - 3 x^{2} - (- 3 x^{2} + x) = - 3 x^{2} + x + 11 - (- 3 x^{2} + x)

化简

x = 11

作图

流行的例子

90(x+1/2)-100x=15

90 (x + \frac{1}{2}) - 100 x = 15

\frac{x}{7} = 12

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

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

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

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

\frac{1}{2} x = - 4