We will solve as follows:
*First: We know that all quadratic expansions such as this follow the rule:
[tex]a^2+2ab+b^2[/tex]
*Second: From this, we will complete the quadratic expansion:
[tex]x^2-14x+49[/tex]
*Third: We will then factor it:
[tex](x-7)^2[/tex]
So, the solution would be option 2: 49; (x -7)^2.
