1,25
Объяснение:
8xy-1 / (2x+y)^2-(2x-y)^2=
= 8xy-1 / ((2x+y)-(2x-y)(2x+y)+(2x-y))=
8xy-1 / (2x+y-2x+y)(2x+y+2x-y)=
=8xy-1 / 2y×4x
X=2/3
y= - 3/4
8×2/3×(-3/4)-1 / 2×(-3/4)×4×2/3=
= (- 4-1) / (- 4)= 5/4=1 1/4
1,25
Объяснение:
Объяснение:
8xy-1 / (2x+y)^2-(2x-y)^2=
= 8xy-1 / ((2x+y)-(2x-y)(2x+y)+(2x-y))=
8xy-1 / (2x+y-2x+y)(2x+y+2x-y)=
=8xy-1 / 2y×4x
X=2/3
y= - 3/4
8×2/3×(-3/4)-1 / 2×(-3/4)×4×2/3=
= (- 4-1) / (- 4)= 5/4=1 1/4