А) 5+x2.x2-36-x/x+6=x(5+x)/(x-6)(x+6)-x/x+6=5x+x2-x2-6x/(x-6)(x+6)=-x/(x-6)(x+6)
б)2m/m-4-5m-2/m2-16=2m/m-4-5m-2?(m-4)(m+4)=2m2+8m-5m+2/(m-4)(m+4)=2m2-3m+2/(m-4)(m+4)
а) y+a/b2+ab+y-b/a2+ab=y+a/b(b+a)+y-b/a(a+b)=ya+a2+yb-b2/ab(a+b)=y(a-b)(a+b)/ab
б)y-b/a2-ab-y-a/ab-b2=y-b/a(a-b)-y-a/b(a-b)=by-b2-ya+a2/ab(a-b)=y(b-a)(a-b)(a+b)/ab(a-b)=y(b-a)(a+b)/ab(a-b).