you need to multiply (x+7) and (x-7) To get the First solution [tex] x^{2}-7x+7x-49=3x[/tex] Then Transpose 3x to The left Side It will be [tex] x^{2} -7x+7x-3x-49=0
[/tex] Then combine like terms [tex] x^{2} -3x-49=0[/tex] That is the final answer Now The Value Of A, B, and C A=0 B=3 C=49