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受欢迎的代数 >

y^2=19y

解答

y^{2} = 19 y

解答

y = 19, y = 0

求解步骤

y^{2} = 19 y

将

19 y

para o lado esquerdo

y^{2} - 19 y = 0

使用求根公式求解

y_{1, 2} = \frac{- ( - 19 ) \pm ( - 19 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

(- 19)^{2} - 4 \cdot 1 \cdot 0 = 19

y_{1, 2} = \frac{- ( - 19 ) \pm 19}{2 \cdot 1}

将解分隔开

y_{1} = \frac{- ( - 19 ) + 19}{2 \cdot 1}, y_{2} = \frac{- ( - 19 ) - 19}{2 \cdot 1}

y = \frac{- ( - 19 ) + 19}{2 \cdot 1} : 19

y = \frac{- ( - 19 ) - 19}{2 \cdot 1} : 0

二次方程组的解是:

y = 19, y = 0

作图

流行的例子

30 x^{2} + 10 = 50

(x - 1) (x + 2) = 18

solvefor x,(x-t)^2+(y+2t)^2=169

so l v e f or x, (x - t)^{2} + (y + 2 t)^{2} = 169

3 (n + 1)^{2} - 7 = 20

solvefor x,5x^2+2xy+10y^2-12x-22y+17=0

so l v e f or x, 5 x^{2} + 2 x y + 10 y^{2} - 12 x - 22 y + 17 = 0