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受欢迎的代数 >

x^2-10x-16=0

解答

x^{2} - 10 x - 16 = 0

解答

x = 5 + 41, x = 5 - 41

+1

十进制

x = 11.40312 \dots, x = - 1.40312 \dots

求解步骤

x^{2} - 10 x - 16 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 10 ) \pm ( - 10 ) ^{2} - 4 \cdot 1 \cdot ( - 16 )}{2 \cdot 1}

(- 10)^{2} - 4 \cdot 1 \cdot (- 16) = 241

x_{1, 2} = \frac{- ( - 10 ) \pm 2 41}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 10 ) + 2 41}{2 \cdot 1}, x_{2} = \frac{- ( - 10 ) - 2 41}{2 \cdot 1}

x = \frac{- ( - 10 ) + 2 41}{2 \cdot 1} : 5 + 41

x = \frac{- ( - 10 ) - 2 41}{2 \cdot 1} : 5 - 41

二次方程组的解是:

x = 5 + 41, x = 5 - 41

作图

流行的例子

(x - 2) (x + 6) = 16

16 - 2 x^{2} = 0

solvefor b,A= 1/3 b^2c

so l v e f or b, A = \frac{1}{3} b^{2} c

-8x+30=-3x^2+5x

- 8 x + 30 = - 3 x^{2} + 5 x

(4-r)(-4-r)+16=0

(4 - r) (- 4 - r) + 16 = 0