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#11




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; 05082009 at 12:56 PM. 
#13




Re: anyone good at algebra?
x^4 + p * x^2 + q = → (x²)² + px² + q = 0
let y = x² → y² + py + q, and apply quadratic formula with D = p² + 4q → y = (p ± √D)/2 → x = √((p ± √D)/2) 
#15




Re: anyone good at algebra?
does Wolverine appear in x^4 + p * x^2 + q = → (x²)² + px² + q = 0?
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