1) a) 3х²/15x^3=1/x
b) 2(x-4)/3(x-4)=2/3
v) (x-3)(x+3)/(x+3)²=
=(x-3)/(x+3)
2)
a) (3x+2)/(-(1-x)= -(3x+2)/(1-x)
b) (-(6x-1)/(x+1)=(-(-(1-6x)/(x+1)
=(1-6x)/(x+1)
3)
a) x/(x-5) и -3/(x-5)
b) x(x+4)/(x+4)(x-4)² и
7(x-4)/(x+4)(x-4)²
v) 5(x-2)/(x+1)(x-2) и
7(x+1)/(x-2)(x+1)
4. сомневаюсь в правильности решения
a) (2x+3)/1
b) (2x+3)/5
v) (2x+3)/(x-1)