Answer
1 distinct rational solution
Work Step by Step
$\bf{\text{Solution Outline:}}$
To evaluate the discriminant of the given equation, $
x^2-8x+16=0
,$ identify first the value of $a,b,$ and $c.$ Then use the Discriminant Formula. If the value of the discriminant is less than zero, then there are $\text{
2 nonreal complex solutions
.}$ If the value is $0,$ then there is $\text{
1 distinct rational solution
.}$ If the value of the discriminant is a positive perfect square, then there are $\text{
2 rational solutions
.}$ Finally, if the value of the discriminant is positive but not a perfect square, there are $\text{
2 irrational solutions
.}$
$\bf{\text{Solution Details:}}$
In the equation above, $a=
1
,$ $b=
-8
,$ and $c=
16
.$ Using the Discriminant Formula which is given by $b^2-4ac,$ the value of the discriminant is
\begin{array}{l}\require{cancel}
(-8)^2-4(1)(16)
\\\\=
64-64
\\\\=
0
.\end{array}
Since the discriminant is $\text{
equal to zero
,}$ then there is $\text{
1 distinct rational solution
.}$