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受欢迎的代数 >

x^2-4*x+4=0

解答

x^{2} - 4 \cdot x + 4 = 0

解答

x = 2

求解步骤

x^{2} - 4 x + 4 = 0

使用求根公式求解

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

(- 4)^{2} - 4 \cdot 1 \cdot 4 = 0

x_{1, 2} = \frac{- ( - 4 ) \pm 0}{2 \cdot 1}

x = \frac{- ( - 4 )}{2 \cdot 1}

\frac{- ( - 4 )}{2 \cdot 1} = 2

x = 2

二次方程组的解是:

x = 2

作图

流行的例子

3 x^{2} + 20 x + 13 = - 4

-2034x^2+170086x-6426=0

- 2034 x^{2} + 170086 x - 6426 = 0

\frac{x ^{2}}{4} = 5

-5x^2+70x-295=0

- 5 x^{2} + 70 x - 295 = 0

a (x) = x^{2} + 3 x - 10