14х^2-5х-1
10х^2-13 х + 4
14х^2-5x-1=14(x-1/2)(x+1/7)
D=25-4*14*(-1)=25+56=81
x1=(5+9):28=14/28=1/2; x2=(5-9):28=-4/28=-1/7
10х^2-13 х + 4=10(x-4/5)(x-1/2)
D=169-4*10*4=169-160=9
x1=(13+3):20=4/5; x2=(13-3):20=10/20=1/2
14х^2-5х-1 = 14(x-1/2)(x+1/7)= 7(x+1/7)=7x+1
10х^2-13 х + 4 10(x-4/5)(x-1/2) 5(x-4/5) 5x-4