Question

x^2-4x+5 find roots by qudratic formula​

Answer 1

Answer:

we know that D= b²-4ac

=(-4)²-4(1)(5)

=16-9

=7

x = -b +√D / 2a

x = -(-4)+√7 /2(1)

x = 4+√7 / 2 or x =4 - √7 /2

the roots of equation is 4+√7 / 2 and 4 - √7 / 2