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受欢迎的代数 >

14=w(2w-3)

解答

14 = w (2 w - 3)

解答

w = \frac{7}{2}, w = - 2

+1

十进制

w = 3.5, w = - 2

求解步骤

14 = w (2 w - 3)

展开

w (2 w - 3) : 2 w^{2} - 3 w

14 = 2 w^{2} - 3 w

交换两边

2 w^{2} - 3 w = 14

将

14

para o lado esquerdo

2 w^{2} - 3 w - 14 = 0

使用求根公式求解

w_{1, 2} = \frac{- ( - 3 ) \pm ( - 3 ) ^{2} - 4 \cdot 2 ( - 14 )}{2 \cdot 2}

(- 3)^{2} - 4 \cdot 2 (- 14) = 11

w_{1, 2} = \frac{- ( - 3 ) \pm 11}{2 \cdot 2}

将解分隔开

w_{1} = \frac{- ( - 3 ) + 11}{2 \cdot 2}, w_{2} = \frac{- ( - 3 ) - 11}{2 \cdot 2}

w = \frac{- ( - 3 ) + 11}{2 \cdot 2} : \frac{7}{2}

w = \frac{- ( - 3 ) - 11}{2 \cdot 2} : - 2

二次方程组的解是:

w = \frac{7}{2}, w = - 2

作图

流行的例子

t^{2} + 2 t - 24 = 0

29.12^2=w^2+(3w)^2

29.1 2^{2} = w^{2} + (3 w)^{2}

x^{2} - 88 = 12

x^{2} + 10 = 91

solvefor x,x^2-2xy^2+y=1

so l v e f or x, x^{2} - 2 x y^{2} + y = 1