9.93t-4.9t^2+9.93t+4.9t^2=5.87

解答

9.93 t - 4.9 t^{2} + 9.93 t + 4.9 t^{2} = 5.87

t = \frac{587}{1986}

十进制

t = 0.29556 \dots

求解步骤

9.93 t - 4.9 t^{2} + 9.93 t + 4.9 t^{2} = 5.87

对同类项分组

- 4.9 t^{2} + 4.9 t^{2} + 9.93 t + 9.93 t = 5.87

2 \cdot 1 0^{- 6} = 2 \cdot 1 0^{- 3}

a + 3 = 8

\frac{2 x - 3}{4} - \frac{2 x + 1}{6} = \frac{1}{2}

L = 2 \cdot (0.9) + 7

so l v e f or x, - 4 x - y = 3