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Simplificati raportul:
a-3√a
√a-3


Răspuns :

rationalizam cu √a+3
[tex] \frac{(a- 3\sqrt{a})( \sqrt{a}+3) }{a-9} = \frac{a \sqrt{a}+3a-3a-9 \sqrt{a} }{a-9} = \frac{ \sqrt{a}(a-9) }{a-9} = \sqrt{a} [/tex]