помогите !!!!!!!!!!!!!!!!!!!!!!

Question

помогите !!!!!!!!!!!!!!!!!!!!!!

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Answer 1

3) х+у/у:х^2+2ху+у^2/ху^2= =х+у/у•ху^2/(х+у)^2=ху/х+у
5)5х^2-7х+2=0
D=49-40=9
х1,2=7±3/10
х1=7+3/10=10/10=1
х2=7-3/10=4/10=2/5
Ответ:Б

Answer 2

5x2-7x+2=0
D=b2-4ac=(-7)2-4×5×2=9
D=3
x1=-7+-3÷2
x1=-2
x2=-5