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受欢迎的代数 >

w^2+3w=3

解答

w^{2} + 3 w = 3

解答

w = \frac{- 3 + 21}{2}, w = \frac{- 3 - 21}{2}

+1

十进制

w = 0.79128 \dots, w = - 3.79128 \dots

求解步骤

w^{2} + 3 w = 3

将

3

para o lado esquerdo

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

使用求根公式求解

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

3^{2} - 4 \cdot 1 \cdot (- 3) = 21

w_{1, 2} = \frac{- 3 \pm 21}{2 \cdot 1}

将解分隔开

w_{1} = \frac{- 3 + 21}{2 \cdot 1}, w_{2} = \frac{- 3 - 21}{2 \cdot 1}

w = \frac{- 3 + 21}{2 \cdot 1} : \frac{- 3 + 21}{2}

w = \frac{- 3 - 21}{2 \cdot 1} : \frac{- 3 - 21}{2}

二次方程组的解是:

w = \frac{- 3 + 21}{2}, w = \frac{- 3 - 21}{2}

作图

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