a-5 a+5 5 (_____ _____ - _________) ÷﹙_______ _1) a²-10a+25 a²-5a a=1/(a-5)+(a+5)/[a(5-a)]/(5-a)/a=1/(a-5)+(a+5)*1/[a(5-a)]*a/(5-a)=1/(a-5)+(a+5)/(5-a)^2=[(a+5)-(5-a)]/(5-a)^2=2a/(5-a)^2 ....