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受欢迎的代数 >

5r^2+24r-3=2

解答

5 r^{2} + 24 r - 3 = 2

解答

r = \frac{1}{5}, r = - 5

+1

十进制

r = 0.2, r = - 5

求解步骤

5 r^{2} + 24 r - 3 = 2

将

2

para o lado esquerdo

5 r^{2} + 24 r - 5 = 0

使用求根公式求解

r_{1, 2} = \frac{- 24 \pm 2 4 ^{2} - 4 \cdot 5 ( - 5 )}{2 \cdot 5}

2 4^{2} - 4 \cdot 5 (- 5) = 26

r_{1, 2} = \frac{- 24 \pm 26}{2 \cdot 5}

将解分隔开

r_{1} = \frac{- 24 + 26}{2 \cdot 5}, r_{2} = \frac{- 24 - 26}{2 \cdot 5}

r = \frac{- 24 + 26}{2 \cdot 5} : \frac{1}{5}

r = \frac{- 24 - 26}{2 \cdot 5} : - 5

二次方程组的解是:

r = \frac{1}{5}, r = - 5

作图

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