15x²-8x+1=0 тут дискриминант

Question

15x²-8x+1=0 тут дискриминант

Answer 1

D=64-60=4=2
X1=8-2/15*2=6/30=0.2
X2=8+2/15*2=10/30

Answer 2

D=(-8^2)-4*15*1=4
x1=1/3
x2=1/5