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受欢迎的代数 >

n^2-6n-3=0

解答

n^{2} - 6 n - 3 = 0

解答

n = 3 + 23, n = 3 - 23

+1

十进制

n = 6.46410 \dots, n = - 0.46410 \dots

求解步骤

n^{2} - 6 n - 3 = 0

使用求根公式求解

n_{1, 2} = \frac{- ( - 6 ) \pm ( - 6 ) ^{2} - 4 \cdot 1 \cdot ( - 3 )}{2 \cdot 1}

(- 6)^{2} - 4 \cdot 1 \cdot (- 3) = 43

n_{1, 2} = \frac{- ( - 6 ) \pm 4 3}{2 \cdot 1}

将解分隔开

n_{1} = \frac{- ( - 6 ) + 4 3}{2 \cdot 1}, n_{2} = \frac{- ( - 6 ) - 4 3}{2 \cdot 1}

n = \frac{- ( - 6 ) + 4 3}{2 \cdot 1} : 3 + 23

n = \frac{- ( - 6 ) - 4 3}{2 \cdot 1} : 3 - 23

二次方程组的解是:

n = 3 + 23, n = 3 - 23

作图

流行的例子

0.5 s + 1 = 7 + 4.5 s

(a + 3)^{2} = 25

\frac{x + 2}{3} = 5

化简 (sqrt(35))/(sqrt(7))

s im pl i f y \frac{35}{7}

因式分解 2/(2x-3)+x/(8x^2-10x-3)

f a c t or \frac{2}{2 x - 3} + \frac{x}{8 x ^{2} - 10 x - 3}