I have a question:
For the quadratic equation (2x+1)(x+3)=0, does 2=a, 1=b, and 3=c?
Are you thinking that you need to use the Quadratic Formula to solve the equation (2x+1)(x+3) = 0 ?
If so, I would like you to know that there is a much simpler method that uses something called the Zero-Product Property.
-7+5=-2 and I got -2/2.
That was supposed to be (-7+5)/4 to get -0.5, right?