1
(3x-x²)/2-(2x²-x)/6=x /*6
3(3x-x²)-(2x²-x)=6x
9x-3x²-2x²+x-6x=0
5x²-4x=0
x(5x-4)=0
x=0 x=0,8
2
(5x-7)/(x-3)=(4x-3)/x
ОЗ x(x-3)≠0⇒x≠0,x≠3
x*(5x-7)=(x-3)(4x-3)
5x²-7x-4x²+3x+12x-9=0
x²+8x-9=0
x1+x2=-8 U x1*x2=-9
x1=-9 U x2=1
3
(x-7)/(x-2)+(x+4)/(x+2)=1
ОЗ (x-2)(x+2)≠0⇒x≠3,x≠-3
(x+2)(x-7)+(x+2)(x+4)=(x-2)(x+2)
x²-7x+2x-14+x²+4x-2x-8-x²+4=0
x²-3x-18=0
x1+x2=3 U x1*x2=-18
x1=6 U x2=-3