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Aduceti la forma cea mai simpla expresia:
a) [tex] \sqrt{36 x^{2} y^{3} } [/tex] daca x < 0, y > 0
b)[tex] \sqrt \frac{a^{6} }{25b^{2} }[/tex] daca a [tex]\geq [/tex] 0, b > 0
c)5xy * [tex] \sqrt{ \frac{1}{100xy^{2} } } [/tex] daca x > 0, y < 0


Răspuns :

a) R: 6x√y;  orice nr. negativ ridicat la ² devine pozitiv.

b) a³/ 5b

c)5xy* 1/10y*√x⁻¹= x/2*√x⁻¹