Question 1161350
The range of the function {{{f(k) = k^2 + 2k + 1}}} is { {{{25}}},{{{64}}} }. What is the function’s domain?

{{{k^2 + 2k + 1 = 25}}}
{{{k^2 + 2k - 24 = 0}}}
{{{k^2 + 2k - 24 = 0}}}
{{{(k - 4) (k + 6) = 0}}}

=>{{{k=4}}} and {{{k=-6}}}

{{{k^2 + 2k + 1 = 64}}}
{{{k^2 + 2k - 63 = 0}}}
 {{{(k - 7) (k + 9) = 0}}}

=>{{{k=7}}} and {{{k=-9}}}

 the domain is:{ {{{-9}}}, {{{-6}}}, {{{4}}}, {{{7}}} }