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受欢迎的代数 >

3x^3+8=9x^2+3x^3

解答

3 x^{3} + 8 = 9 x^{2} + 3 x^{3}

解答

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

+1

十进制

x = 0.94280 \dots, x = - 0.94280 \dots

求解步骤

3 x^{3} + 8 = 9 x^{2} + 3 x^{3}

交换两边

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

将

3 x^{3}

para o lado esquerdo

9 x^{2} = 8

两边除以

9

x^{2} = \frac{8}{9}

对于

x^{2} = f (a)

解为

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

x = \frac{8}{9}, x = - \frac{8}{9}

\frac{8}{9} = \frac{2 2}{3}

- \frac{8}{9} = - \frac{2 2}{3}

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

作图

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