Find the value of I know But I'm stuck on Any tips?
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It might help if you realise from your equations that . See what you can do with the latter three equations.
Have tried cross multiplying them, nothing works out right now. Any other options?
x(x+ y+ z)= 2- yz y(x+ y+ z)= 4- xz x(x+ y+ z)= 8- yz Find the value of |x+ y+ z| I know But I'm stuck on Any tips? Well, why not just take the square root of both sides?
Last edited by HallsofIvy; Aug 29th 2011 at 05:20 PM.
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