When using the quadratic formula, we always need to write the quadratic equation in standard form to see for the values of a, b and c. If we rewrite the quadratic equation in standard form, we have:
[tex]2x^2-7x=15\Rightarrow2x^2-7x-15=0[/tex]
Having that the quadratic equation, in standard form, is:
[tex]ax^2+bx+c=0[/tex]
Then, we have that, for this case, a = 2, b = -7, and c = -15. Thus, we need to use the quadratic formula using these values.
Therefore, the value for c is c = -15.
