The quadratic equation $8x^2+12x-14 = 6x^2 - 4x$ has two real roots. What is the sum of the squares of these roots?
This is essentially a repeated question where the numbers have changed. I refer you to this link: https://web2.0calc.com/questions/help-plz_76020 and this link: https://web2.0calc.com/questions/help-please-the-asnwers-are-not-56-9-8-or-4. These are both similar problems, and you should be able to extrapolate the information from these fora to solve this one.