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受欢迎的代数 >

y^2-15y+50=0

解答

y^{2} - 15 y + 50 = 0

解答

y = 10, y = 5

求解步骤

y^{2} - 15 y + 50 = 0

使用求根公式求解

y_{1, 2} = \frac{- ( - 15 ) \pm ( - 15 ) ^{2} - 4 \cdot 1 \cdot 50}{2 \cdot 1}

(- 15)^{2} - 4 \cdot 1 \cdot 50 = 5

y_{1, 2} = \frac{- ( - 15 ) \pm 5}{2 \cdot 1}

将解分隔开

y_{1} = \frac{- ( - 15 ) + 5}{2 \cdot 1}, y_{2} = \frac{- ( - 15 ) - 5}{2 \cdot 1}

y = \frac{- ( - 15 ) + 5}{2 \cdot 1} : 10

y = \frac{- ( - 15 ) - 5}{2 \cdot 1} : 5

二次方程组的解是:

y = 10, y = 5

作图

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