Question

The equation x²-2x+1 has how many roots
1. 0
2.1
3.2
4.3​

Answer 1

x^2 - 2x + 1 = 0

a=1, b=-2, c=1

D=b^2 - 4ac

=4-4*1*1

=4-4

=0

if D=0, roots are real and equal, thus there is 1 root.