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受欢迎的代数 >

m^2+6m+7=0

解答

m^{2} + 6 m + 7 = 0

解答

m = - 3 + 2, m = - 3 - 2

+1

十进制

m = - 1.58578 \dots, m = - 4.41421 \dots

求解步骤

m^{2} + 6 m + 7 = 0

使用求根公式求解

m_{1, 2} = \frac{- 6 \pm 6 ^{2} - 4 \cdot 1 \cdot 7}{2 \cdot 1}

6^{2} - 4 \cdot 1 \cdot 7 = 22

m_{1, 2} = \frac{- 6 \pm 2 2}{2 \cdot 1}

将解分隔开

m_{1} = \frac{- 6 + 2 2}{2 \cdot 1}, m_{2} = \frac{- 6 - 2 2}{2 \cdot 1}

m = \frac{- 6 + 2 2}{2 \cdot 1} : - 3 + 2

m = \frac{- 6 - 2 2}{2 \cdot 1} : - 3 - 2

二次方程组的解是:

m = - 3 + 2, m = - 3 - 2

作图

流行的例子

solvefor x,9x^2+4y^2-12z=0

so l v e f or x, 9 x^{2} + 4 y^{2} - 12 z = 0

solvefor x,r=(kx^2)/y

so l v e f or x, r = \frac{k x ^{2}}{y}

4 x^{2} = x - 2

5 y^{2} - 28 y + 15 = 0

24x^2-280x+600=0

24 x^{2} - 280 x + 600 = 0