can someone explain to me how sqrt(x^2 + x^4) became sqrt(1+x^2)?
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Originally Posted by l flipboi l can someone explain to me how sqrt(x^2 + x^4) became sqrt(1+x^2)? You can factor out an x^2 from the expression under the square root: and, by the laws of surds, The |x| which is now outside the radical is cancelled with the x in the numerator. (They have said that before cancelling which is OK if x>0[/tex]
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