Question 8608
This is NOT an equation, so you can't solve for c, as was done in the previous solution that was posted by a tutor.  The problem is to FACTOR the expression, NOT to SOLVE the equation!!

It should be 
( (c+3) - 7 )( (c+3) + 7)


This simplifies to 
(c-4)(c+10)


R^2 at SCC