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受欢迎的代数 >

x^2-70x+200=0

解答

x^{2} - 70 x + 200 = 0

解答

x = 5 (7 + 41), x = 5 (7 - 41)

+1

十进制

x = 67.01562 \dots, x = 2.98437 \dots

求解步骤

x^{2} - 70 x + 200 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 70 ) \pm ( - 70 ) ^{2} - 4 \cdot 1 \cdot 200}{2 \cdot 1}

(- 70)^{2} - 4 \cdot 1 \cdot 200 = 1041

x_{1, 2} = \frac{- ( - 70 ) \pm 10 41}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 70 ) + 10 41}{2 \cdot 1}, x_{2} = \frac{- ( - 70 ) - 10 41}{2 \cdot 1}

x = \frac{- ( - 70 ) + 10 41}{2 \cdot 1} : 5 (7 + 41)

x = \frac{- ( - 70 ) - 10 41}{2 \cdot 1} : 5 (7 - 41)

二次方程组的解是:

x = 5 (7 + 41), x = 5 (7 - 41)

作图

流行的例子

n^{2} + 13 n + 22 = 7

(((x+2))/2)+(((x-3))/5)=(6/10)+12

(\frac{( x + 2 )}{2}) + (\frac{( x - 3 )}{5}) = (\frac{6}{10}) + 12

因式分解 5x^2+50xy+125y^2

f a c t or 5 x^{2} + 50 x y + 125 y^{2}

6 x - 2 \geq 9 x - 14

化简 (6x^5)^2

s im pl i f y (6 x^{5})^{2}