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Stiind ca x/y=2/3 sa se calculeze:
a)xla2/yla2
b)x/x-y
c)x+3y/2x+5y
d)xla2+yla2/8xy


Răspuns :

x•3=y•2,
a) x^2=4
y^2=9
b)2/2-3=1-3=-2
c)2+9/4+15=11/19
d)4+9/8•36=13/288