Ответ:

Объяснение:

2x²+5x-7=0

x₁+x₂=-5/2; -7/2 +1=-5/2

x₁x₂=-7/2; -7/2 ·1=-7/2

x₁=-7/2; x₂=1

(2x₁²+3x₁x₂+2x₂²)/(4x₁²x₂+4x₁x₂²)=(2(x₁²+x₂²)+3x₁x₂)/(4x₁x₂(x₁+x₂))=(2((-7/2)²+1²)+3·(-7/2))/(4·(-7/2)·(-5/2))=(49/2 +2/2)/(-7·(-5))=51/2 ·1/35=51/70