P
pl09


1,$x^2$ + $\sqrt{2-x}$ = 2$x^2\sqrt{2-x}$
2,$ 4\sqrt{1+x} -1=3x + 2\sqrt{1-x} + \sqrt{1-x^2} $
3,$3\sqrt{x^2+x-2}+7\sqrt{2+x}=9\sqrt{x-1}+11$
2,$ 4\sqrt{1+x} -1=3x + 2\sqrt{1-x} + \sqrt{1-x^2} $
3,$3\sqrt{x^2+x-2}+7\sqrt{2+x}=9\sqrt{x-1}+11$
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