solvefor y,y^2=2y

解答

y, y^{2} = 2 y

y = 2, y = 0

求解步骤

y^{2} = 2 y

将

2 y

para o lado esquerdo

y^{2} - 2 y = 0

使用求根公式求解

y_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

(- 2)^{2} - 4 \cdot 1 \cdot 0 = 2

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

将解分隔开

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

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

y = \frac{- ( - 2 ) - 2}{2 \cdot 1} : 0

二次方程组的解是:

y = 2, y = 0

5.8 \cdot 1 5^{2} + 0.32 \cdot y^{2} - 47 \cdot 15 - 2.7 y + 1750 = 145000

j^{2} - 36 = 0

64.1 = - 5.77 + 354071.5 \cdot Q^{2}

7 (x + 4) (x - 8) - \frac{224}{10} x = x

- 5 + x = x^{2}