Question

32 и 34 помогите пожалуйста

Answer 1

32. (3x+xy²-x²y-3y)/(y²-x²)=(3*(x-y)-xy*(x-y))/(y²-x²)=

=(x-y)*(3-xy)/((y-x)*(y+x))=(y-x)*(xy-3)/((y-x)*(y+x))=(xy-3)/(x+y).

34. (2a²-2b²-a+b)/(1-2a-2b)=(2*(a²-b²)-(a-b))/(1-2a-2b)=

=(2*(a-b)*(a+b)-(a-b))/(1-2a-2b)=(a-b)*(2*(a+b)-1)/(1-2a-2b)=

=(a-b)*(2a+2b-1)/(1-2a-2b)=(b-a)*(2a+2b-1)/(2a+2b-1)=b-a.