Question

........................ 10 баллов

Answer 1

(9x²-y²)/(3x+y)=(3x-y)(3x+y)/(3x+y)=3x-y

(2ab-a)/(4b²-4b+1)=a(2b-1)/(2b-1)²=a/(2b-1)

(x²+2x+4)/(x³-8)=(x²+2x+4)/(x-2)(x²+2x+4)=1/(x-2)

(1+a³/(1+a)=(1+a)(1-a+a²)/(1+a)=1-a+a²