+128470 x^2 + 9x - 15 = 0
Not too much math to do here, NSS
The quadratic formula will have "-9" as the first term in the numerator, so we can eliminate A and B
Further, the dscriminant = 9^2 - [4*1 * -15] = 81 - (-60) = 81 + 60 = 141
This will be the integer under the radical.....so....
"C" is correct !!!!
