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受欢迎的代数 >

3x^2+12=16

解答

3 x^{2} + 12 = 16

解答

x = \frac{2}{3}, x = - \frac{2}{3}

+1

十进制

x = 1.15470 \dots, x = - 1.15470 \dots

求解步骤

3 x^{2} + 12 = 16

将

12

到右边

3 x^{2} = 4

两边除以

3

x^{2} = \frac{4}{3}

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = \frac{4}{3}, x = - \frac{4}{3}

\frac{4}{3} = \frac{2}{3}

- \frac{4}{3} = - \frac{2}{3}

x = \frac{2}{3}, x = - \frac{2}{3}

作图

流行的例子

3 x = x^{2} - 40

3 x + x^{2} = - 7

5^{2} = 1 0^{2} + x^{2}

2 x^{2} = - 6 x - 3

0.2q^2-6q+80=0.6q^2-12q+80

0.2 q^{2} - 6 q + 80 = 0.6 q^{2} - 12 q + 80