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受欢迎的代数 >

9m^2-18m+8=0

解答

9 m^{2} - 18 m + 8 = 0

解答

m = \frac{4}{3}, m = \frac{2}{3}

+1

十进制

m = 1.33333 \dots, m = 0.66666 \dots

求解步骤

9 m^{2} - 18 m + 8 = 0

使用求根公式求解

m_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 \cdot 9 \cdot 8}{2 \cdot 9}

(- 18)^{2} - 4 \cdot 9 \cdot 8 = 6

m_{1, 2} = \frac{- ( - 18 ) \pm 6}{2 \cdot 9}

将解分隔开

m_{1} = \frac{- ( - 18 ) + 6}{2 \cdot 9}, m_{2} = \frac{- ( - 18 ) - 6}{2 \cdot 9}

m = \frac{- ( - 18 ) + 6}{2 \cdot 9} : \frac{4}{3}

m = \frac{- ( - 18 ) - 6}{2 \cdot 9} : \frac{2}{3}

二次方程组的解是:

m = \frac{4}{3}, m = \frac{2}{3}

作图

流行的例子

(x - 5)^{2} \geq 1

2(3x+1)-x+6=2(x-1)

2 (3 x + 1) - x + 6 = 2 (x - 1)

2 x - 3 \leq 7

7 (w + 5) = 105

2 \leq m