1. The problem statement, all variables and given/known data Find the real zeros of the following quadratic functions. Every problem will have an f(x)= in front of it. 1) x^2- 3x- 28 2) x^2+12x+36 3)x^2- 3 4) 4- x^2 2. Relevant equations 3. The attempt at a solution 1) Common factors are 7 and 4. So would it be (x+7)?(x-4)=0? Which means the zeros would be -7 and 4. If I'm doing it right that is.