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受欢迎的代数 >

4x^2-25x+36=0

解答

4 x^{2} - 25 x + 36 = 0

解答

x = 4, x = \frac{9}{4}

+1

十进制

x = 4, x = 2.25

求解步骤

4 x^{2} - 25 x + 36 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 25 ) \pm ( - 25 ) ^{2} - 4 \cdot 4 \cdot 36}{2 \cdot 4}

(- 25)^{2} - 4 \cdot 4 \cdot 36 = 7

x_{1, 2} = \frac{- ( - 25 ) \pm 7}{2 \cdot 4}

将解分隔开

x_{1} = \frac{- ( - 25 ) + 7}{2 \cdot 4}, x_{2} = \frac{- ( - 25 ) - 7}{2 \cdot 4}

x = \frac{- ( - 25 ) + 7}{2 \cdot 4} : 4

x = \frac{- ( - 25 ) - 7}{2 \cdot 4} : \frac{9}{4}

二次方程组的解是:

x = 4, x = \frac{9}{4}

作图

流行的例子

2 x^{2} - 4 x + 13 = 9

4 x (1 + x) = 0

x^2-10.24x+2.56=0

x^{2} - 10.24 x + 2.56 = 0

因式分解 x^2+10x+25=0

f a c t or x^{2} + 10 x + 25 = 0

completesquare 3x^2-9x+8

co m pl e t es q u a re 3 x^{2} - 9 x + 8