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受欢迎的代数 >

-2s^2-60s-310=0

解答

- 2 s^{2} - 60 s - 310 = 0

解答

s = - 15 - 70, s = - 15 + 70

+1

十进制

s = - 23.36660 \dots, s = - 6.63339 \dots

求解步骤

- 2 s^{2} - 60 s - 310 = 0

使用求根公式求解

s_{1, 2} = \frac{- ( - 60 ) \pm ( - 60 ) ^{2} - 4 ( - 2 ) ( - 310 )}{2 ( - 2 )}

(- 60)^{2} - 4 (- 2) (- 310) = 470

s_{1, 2} = \frac{- ( - 60 ) \pm 4 70}{2 ( - 2 )}

将解分隔开

s_{1} = \frac{- ( - 60 ) + 4 70}{2 ( - 2 )}, s_{2} = \frac{- ( - 60 ) - 4 70}{2 ( - 2 )}

s = \frac{- ( - 60 ) + 4 70}{2 ( - 2 )} : - 15 - 70

s = \frac{- ( - 60 ) - 4 70}{2 ( - 2 )} : - 15 + 70

二次方程组的解是:

s = - 15 - 70, s = - 15 + 70

作图

流行的例子

0=-16t^2+84t+140

0 = - 16 t^{2} + 84 t + 140

2 x^{2} + 3 x - 230 = 0

solvefor v,g*h= 1/2*v^2

so l v e f or v, g \cdot h = \frac{1}{2} \cdot v^{2}

solvefor x,mx^2-3x+3=0

so l v e f or x, m x^{2} - 3 x + 3 = 0

x^2+2.3x-4.5a=0

x^{2} + 2.3 x - 4.5 a = 0