(x + 1/x)² = 3 | √
<u>x + 1/x</u> = √3
According to short multiplication formula:
(a + b)³ =a³ + 3a²b + 3ab² + b³
x³ + 1/x³ = (x)³ + (1/x)³ = (x + 1/x)³ - 3x²/x - 3x/x² =
= (x + 1/x)³ - 3x - 3/x = (<u>x + 1/x</u>)³ - 3(<u>x + 1/x</u>) =
= (√3)³ - 3√3 = 3√3 - 3√3 = 0
If (x + 1/x)² = 3 the value of x³ + 1/x³ is 0.
There's no drop-down menu but I'd say the answer you want is kilometers.
She needs to leave at 3:55 in order to get there 15 minutes before the game :) hope this helps!
You substitute the y from the second eqaution to the y in the first equation
1 3/16 = 19/16
(19/16) / (1/8) =
19/16 * 8/1 =
152/16 =
9.5
