Equation: x + 3?x - 10 = 0
L Loren Senior Member Joined Aug 28, 2007 Messages 1,299 May 18, 2008 #2 Re: Help Please Solving for X x + 3?x - 10 = 0 3?x = 10 - x Now, square both sides and solve for x. Be sure to check your answers because you may have introduced extraneous roots in the squaring process.
Re: Help Please Solving for X x + 3?x - 10 = 0 3?x = 10 - x Now, square both sides and solve for x. Be sure to check your answers because you may have introduced extraneous roots in the squaring process.
skeeter Elite Member Joined Dec 15, 2005 Messages 3,218 May 18, 2008 #3 smaxemow said: Equation: x + 3?x - 10 = 0 Click to expand... let x=t2\displaystyle x = t^2x=t2 t2+3t−10=0\displaystyle t^2 + 3t - 10 = 0t2+3t−10=0 (t+5)(t−2)=0\displaystyle (t + 5)(t - 2) = 0(t+5)(t−2)=0 t=−5\displaystyle t = -5t=−5 , x=25\displaystyle x = 25x=25 ... extraneous solution t=2\displaystyle t = 2t=2 , x=4\displaystyle x = 4x=4
smaxemow said: Equation: x + 3?x - 10 = 0 Click to expand... let x=t2\displaystyle x = t^2x=t2 t2+3t−10=0\displaystyle t^2 + 3t - 10 = 0t2+3t−10=0 (t+5)(t−2)=0\displaystyle (t + 5)(t - 2) = 0(t+5)(t−2)=0 t=−5\displaystyle t = -5t=−5 , x=25\displaystyle x = 25x=25 ... extraneous solution t=2\displaystyle t = 2t=2 , x=4\displaystyle x = 4x=4
