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受欢迎的代数 >

-2v^2-7=47v^2

解答

- 2 v^{2} - 7 = 47 v^{2}

解答

v = \frac{1}{7} i, v = - \frac{1}{7} i

求解步骤

- 2 v^{2} - 7 = 47 v^{2}

将

7

到右边

- 2 v^{2} = 47 v^{2} + 7

将

47 v^{2}

para o lado esquerdo

- 49 v^{2} = 7

两边除以

- 49

v^{2} = - \frac{1}{7}

对于

x^{2} = f (a)

解为

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

v = - \frac{1}{7}, v = - - \frac{1}{7}

- \frac{1}{7} = \frac{1}{7} i

- - \frac{1}{7} = - \frac{1}{7} i

v = \frac{1}{7} i, v = - \frac{1}{7} i

作图

流行的例子

因式分解 x^3-2x^2-4x+8

f a c t or x^{3} - 2 x^{2} - 4 x + 8

0.1(8+x)=0.6(x+8)

0.1 (8 + x) = 0.6 (x + 8)

8n^2+4n-16=-n^2

8 n^{2} + 4 n - 16 = - n^{2}

因式分解 12x^3-8x^2-20x

f a c t or 12 x^{3} - 8 x^{2} - 20 x

1 + 8 x + 9 = - 20 + 2 x