Question

What is the discriminant of the given equation ?

X^2-2x+2+0
a)-12
b)8
c)-4
d)-8

Answer 1

∆= b^2 - 4ac

where b= -2
a=1
c=2

therefore: 2^2 - 4 x 1 x 2
= 4 - 4 x 2
= 4 - 8
= -4