100 x^{2} - 160х +63 =0

Question

100 x^{2} - 160х +63 =0

Answer 1

D=b^2-4ac=160^2-4×100×63=25600-25200=400=20
x1=160-20/2×100=140/200=7/10
x2=160+20/2×100=180/200=9/10