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受欢迎的代数 >

p^2+2p-13=-3p

解答

p^{2} + 2 p - 13 = - 3 p

解答

p = \frac{- 5 + 77}{2}, p = \frac{- 5 - 77}{2}

+1

十进制

p = 1.88748 \dots, p = - 6.88748 \dots

求解步骤

p^{2} + 2 p - 13 = - 3 p

将

3 p

para o lado esquerdo

p^{2} + 5 p - 13 = 0

使用求根公式求解

p_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 \cdot 1 \cdot ( - 13 )}{2 \cdot 1}

5^{2} - 4 \cdot 1 \cdot (- 13) = 77

p_{1, 2} = \frac{- 5 \pm 77}{2 \cdot 1}

将解分隔开

p_{1} = \frac{- 5 + 77}{2 \cdot 1}, p_{2} = \frac{- 5 - 77}{2 \cdot 1}

p = \frac{- 5 + 77}{2 \cdot 1} : \frac{- 5 + 77}{2}

p = \frac{- 5 - 77}{2 \cdot 1} : \frac{- 5 - 77}{2}

二次方程组的解是:

p = \frac{- 5 + 77}{2}, p = \frac{- 5 - 77}{2}

作图

流行的例子

y^{2} - 3 y - 2 = 0

solvefor x,p^1y=-x^2+5x-4

so l v e f or x, p^{1} y = - x^{2} + 5 x - 4

\frac{9}{2} b^{2} = 32

solvefor h,rs+h^2=1

so l v e f or h, rs + h^{2} = 1

(f - 8) (2 f + 9) = 0