Changes made to your input should not affect the solution:
 (1): "c2"   was replaced by   "c^2".  1 more similar replacement(s).
 3.1     Factoring  c2+4c-3 
The first term is,  c2  its coefficient is  1 .
The middle term is,  +4c  its coefficient is  4 .
The last term, "the constant", is  -3 
Step-1 : Multiply the coefficient of the first term by the constant   1 • -3 = -3 
Step-2 : Find two factors of  -3  whose sum equals the coefficient of the middle term, which is   4 .