Question

Efectuati
a)1supra x²y+2 supra xy²
b)5 supra x-2y-3 supra x+2y
va rog frumos ajutatima

Answer 1

a)1/x²y+2/xy² =(y+2x)/x²y²
b)5/(x-2y)-3/(x+2y)=[5(x+2y)-3(x-2y)]/(x-2y)(x+2y)=
=(5x+10y-3x+6y)/(x-2y)(x+2y)=
=(2x+16y)/(x-2y)(x+2y)=
=2(x+8y)/(x²-4y²)