Question

(x-2)(x-3)(x-5)=(x-1)(x-3)(x-5)

Answer 1

$(x-2)(x-3)(x-5)=(x-1)(x-3)(x-5)\\(x-2)underbrace {(x-3)(x-5)}-(x-1)underbrace {(x-3)(x-5)}=0\\(x-3)(x-5)(x-2-(x-1))=0\\(x-3)(x-5)(-1)=0\\(x-3)(x-5)=0\\x_1=3,; x_2=5$