Now playing on dirty.radio: Loading... |
#12
|
|||
|
|||
Re: anyone good at algebra?
Quote:
x^(2/3) - 9x^(1/3) + 8 = ( ³√x)² - 9(³√x) + 8 set y = ³√x ( ³√x)² - 9(³√x) + 8 →y² - 9y + 8 = 0 → ( y - 8 )( y - 1) = 0 r = { 8, 1 } r 8 → ³√x → 8³ = x = 512 → ( ³√512)² - 9(³√512) + 8 = 8² - 9(8) + 8 = 64 - 72 + 8 = 0 r 1 → = ³√x → 1³ = x = 1 → ( ³√1)² - 9(³√1) + 8 = 1² - 9(1) + 8 = 1 - 9 + 8 = 0 Last edited by bas_I_am; 05-08-2009 at 12:56 PM. |
Thread Tools | |
Display Modes | |
|
|