Разложите на монители (5y-6)^2-(2y-3)^2 и (m-3)^2-(3m+1)

A²-b²=(a-b)*(a+b)

1.  (5y-6)²-(2y-3)²=(5y-6-(2y-3))*(5y-6+2y-3)=(3y-3)*(7y-9)=3*(y-1)*(7y-9)

2. (m-3)²-(3m+1)²=(m-3)-(3m+1))*(m-3+3m+1)=(-2m-4)*(4m-2)=-4*(m+2)*(2m-1)