Discriminant: b² - 4ac Equation: y = -2x² + x - 28 a = -2 b = 1 c = -28 1² - (4*-2*28) = 225 -2x² + x - 28 = 225 -2x² + x -(28 -225) = 0 {In order to make it true} -2x² + x +197 = 0 {Now factorise} X = 10.177 or X = -9.678
Please double check this. My first answer was "No real Roots"...But I did it again and got two figures. You'll have to confirm this with a pair. Sorry.
You simplify the fraction by dividing 2 to the nominator and the denominator. So 24/2=12, 8/2=4, 6/2=3. You can only divide a root with a root number so in this case the root three doesn't get affected
