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受欢迎的代数 >

-16t^2+5t+5=0

解答

- 16 t^{2} + 5 t + 5 = 0

解答

t = - \frac{- 5 + 345}{32}, t = \frac{5 + 345}{32}

+1

十进制

t = - 0.42419 \dots, t = 0.73669 \dots

求解步骤

- 16 t^{2} + 5 t + 5 = 0

使用求根公式求解

t_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 ( - 16 ) \cdot 5}{2 ( - 16 )}

5^{2} - 4 (- 16) \cdot 5 = 345

t_{1, 2} = \frac{- 5 \pm 345}{2 ( - 16 )}

将解分隔开

t_{1} = \frac{- 5 + 345}{2 ( - 16 )}, t_{2} = \frac{- 5 - 345}{2 ( - 16 )}

t = \frac{- 5 + 345}{2 ( - 16 )} : - \frac{- 5 + 345}{32}

t = \frac{- 5 - 345}{2 ( - 16 )} : \frac{5 + 345}{32}

二次方程组的解是:

t = - \frac{- 5 + 345}{32}, t = \frac{5 + 345}{32}

作图

流行的例子

- \frac{1}{3} h \geq 8

因式分解 21m^5n-7m^4n^2+7m^3n^3-7m^2n

f a c t or 21 m^{5} n - 7 m^{4} n^{2} + 7 m^{3} n^{3} - 7 m^{2} n

5 x^{2} + 8 x - 4 = 0

s im pl i f y \frac{2}{8} + \frac{3}{4}

34 = 10 x + 14