X²-12x+35=0
x1+x2=12 U x1*x2=35⇒x1=5 U x2=7
x²-17x+70=0
x1+x2=17 U x1*x2=70⇒x1=7 U x2=10
2/(x-5)(x-7)+3/(x-7)(x-10)≤0
(2x-20+3x-15)/(x-5)(x-7)(x-10)≤0
(5x-35)/(x-5)(x-7)(x-10)≤0
5(x-7)/(x-5)(x-7)(x-10)≤0
5/(x-5)(x-10)≤0,x≠7
+ _ +
--------------(5)-------------(10)--------------------
x∈(-5;7) U (7;10)