Identify coefficients: Identify the coefficients a, b, and c from the quadratic equation5y2−6y−6=0 by comparing it to the standard form ax2+bx+c=0. Here, a=5, b=−6, and c=−6.
Calculate discriminant formula: Use the discriminant formula D=b2−4ac to calculate the discriminant of the quadratic equation.Substitute the identified values into the formula: D=(−6)2−4×5×(−6).
Perform calculations: Perform the calculations to find the discriminant. D=36−(−120) which simplifies to D=36+120.
Find final value: Complete the calculation to find the final value of the discriminant. D=156.