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受欢迎的代数 >

solvefor t,-0.8t^2+32t=0

解答

t, - 0.8 t^{2} + 32 t = 0

解答

t = 0, t = 40

求解步骤

- 0.8 t^{2} + 32 t = 0

在两边乘以

10

- 8 t^{2} + 320 t = 0

使用求根公式求解

t_{1, 2} = \frac{- 320 \pm 32 0 ^{2} - 4 ( - 8 ) \cdot 0}{2 ( - 8 )}

32 0^{2} - 4 (- 8) \cdot 0 = 320

t_{1, 2} = \frac{- 320 \pm 320}{2 ( - 8 )}

将解分隔开

t_{1} = \frac{- 320 + 320}{2 ( - 8 )}, t_{2} = \frac{- 320 - 320}{2 ( - 8 )}

t = \frac{- 320 + 320}{2 ( - 8 )} : 0

t = \frac{- 320 - 320}{2 ( - 8 )} : 40

二次方程组的解是:

t = 0, t = 40

作图

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