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Efectuati:[tex] a)\frac{xy^{2}}{x+y} * \frac{(x+y)^{2}}{xy}
b) \frac{ \sqrt{3}a^{2}x }{1,2yz^{2}} * \frac{\sqrt{12}y^{2}}{5a} [/tex]


Răspuns :

a)
xy²/(x+y) × (x+y)²/xy=
=y/1 × (x+y)/1=
=y(x+y)

b)
√3 a²x/1,2yz² × √12y² /5a =
=10√3 ax/12z² × 2√3y /5 =
=2√3 ax/12z² × 2√3y /1 =
= axy/z²