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受欢迎的代数 >

833.6=-0.6q^2+9.6q+450

解答

833.6 = - 0.6 q^{2} + 9.6 q + 450

解答

q = 8 - i \frac{1726}{3}, q = 8 + i \frac{1726}{3}

求解步骤

833.6 = - 0.6 q^{2} + 9.6 q + 450

在两边乘以

10

8336 = - 6 q^{2} + 96 q + 4500

交换两边

- 6 q^{2} + 96 q + 4500 = 8336

将

8336

para o lado esquerdo

- 6 q^{2} + 96 q - 3836 = 0

使用求根公式求解

q_{1, 2} = \frac{- 96 \pm 9 6 ^{2} - 4 ( - 6 ) ( - 3836 )}{2 ( - 6 )}

化简

9 6^{2} - 4 (- 6) (- 3836) : 45178 i

q_{1, 2} = \frac{- 96 \pm 4 5178 i}{2 ( - 6 )}

将解分隔开

q_{1} = \frac{- 96 + 4 5178 i}{2 ( - 6 )}, q_{2} = \frac{- 96 - 4 5178 i}{2 ( - 6 )}

q = \frac{- 96 + 4 5178 i}{2 ( - 6 )} : 8 - i \frac{1726}{3}

q = \frac{- 96 - 4 5178 i}{2 ( - 6 )} : 8 + i \frac{1726}{3}

二次方程组的解是:

q = 8 - i \frac{1726}{3}, q = 8 + i \frac{1726}{3}

作图

流行的例子

s^{2} - 7 s + 10 = 0

n^{2} - 6 n - 40 = 0

0 = x^{2} - 10

9-7x+4x^2=-2x-5+x^2

9 - 7 x + 4 x^{2} = - 2 x - 5 + x^{2}

400 = - 16 t^{2} + 800