Answer:
The dimensions of the desktop are (x+7) units by (x-7) units
Step-by-step explanation:
we know that
The difference of squares is equal to
[tex]a^2-b^2=(a+b)(a-b)[/tex]
we have
[tex]x^2-49[/tex]
Remember that
[tex]49=7^2[/tex]
substitute
[tex]x^2-7^2[/tex]
Applying difference of squares
[tex]x^2-7^2=(x+7)(x-7)[/tex]
therefore
The dimensions of the desktop are (x+7) units by (x-7) units
