x=((4+sqrt(5)))/((4-sqrt(5)))

解答

x = \frac{( 4 + 5 )}{( 4 - 5 )}

x = \frac{21 + 8 5}{11}

十进制

x = 3.53532 \dots

求解步骤

x = \frac{( 4 + 5 )}{( 4 - 5 )}

化简

\frac{4 + 5}{4 - 5} : \frac{21 + 8 5}{11}

x = \frac{21 + 8 5}{11}

so l v e f or x, 4 x = 17 - \frac{( x - y )}{8}

f = 5 (\frac{1}{1 0 ^{2}}) + 2 (\frac{1}{10}) - 1

2 x + 4 = - 0.5 x - 1

so l v e f or x, 12 m + 9 = 63 - 6 x

[5 x (- 2)] = 5 x [a + (- 3)]