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受欢迎的代数 >

88=151t-16t^2

解答

88 = 151 t - 16 t^{2}

解答

t = \frac{151 - 17169}{32}, t = \frac{151 + 17169}{32}

+1

十进制

t = 0.62404 \dots, t = 8.81345 \dots

求解步骤

88 = 151 t - 16 t^{2}

交换两边

151 t - 16 t^{2} = 88

将

88

para o lado esquerdo

151 t - 16 t^{2} - 88 = 0

改写成标准形式

a x^{2} + b x + c = 0

- 16 t^{2} + 151 t - 88 = 0

使用求根公式求解

t_{1, 2} = \frac{- 151 \pm 15 1 ^{2} - 4 ( - 16 ) ( - 88 )}{2 ( - 16 )}

15 1^{2} - 4 (- 16) (- 88) = 17169

t_{1, 2} = \frac{- 151 \pm 17169}{2 ( - 16 )}

将解分隔开

t_{1} = \frac{- 151 + 17169}{2 ( - 16 )}, t_{2} = \frac{- 151 - 17169}{2 ( - 16 )}

t = \frac{- 151 + 17169}{2 ( - 16 )} : \frac{151 - 17169}{32}

t = \frac{- 151 - 17169}{2 ( - 16 )} : \frac{151 + 17169}{32}

二次方程组的解是:

t = \frac{151 - 17169}{32}, t = \frac{151 + 17169}{32}

作图

流行的例子

\frac{5}{7} n = - \frac{5}{16}

化简 20^{-1/2}

s im pl i f y 2 0^{- \frac{1}{2}}

因式分解 2q^4+9q^3-18q^2

f a c t or 2 q^{4} + 9 q^{3} - 18 q^{2}

\frac{x}{5} + 7 = 10

(x+4)(2x-3)<= 0

(x + 4) (2 x - 3) \leq 0