(y-2)×(y-4)=0 помогите

Question

(y-2)×(y-4)=0 помогите

Answer 1

(y-2)×(y-4)=0. y^2-4y-2y+8=0. y^2-6y+8=0. D=9-8=1. y1=(3+1)/1=4. y2=(3-1)/1=2.