1. (3x-x²)/2+(2x²-x)/6=x I×6
9x-3x²+2x²-x=6x
x²-2x=0
x(x-2)=0
x₁=0 x₂=2
2. (2x²+3x)/(3-x)=(x-x²)/(x-3) ОДЗ: х≠3
(2x²+3x)/(3-x)=(x²-x)/(3-x)
2x²+3x=x²-x
x²+4x=0
x(x+4)=0
x₁=0 x₂=-4.
3. (5x-7)/(x-3)=(4x-3)/x ОДЗ: х≠0 х≠3
5x²-7x=4x²-15x+9
x²+8x-9=0 D=100
x₁=-9 x₂=1.