Identify coefficients: Identify the coefficients of the quadratic equation.The quadratic equation is in the form ax2+bx+c=0. For the equation 5x2+x+1=0, the coefficients are:a = 5b = 1c = 1
Use discriminant formula: Use the discriminant formula.The discriminant D of a quadratic equation ax2+bx+c=0 is given by D=b2−4ac. We will substitute the identified values of a, b, and c into this formula.
Calculate discriminant: Calculate the discriminant.Substitute a=5, b=1, and c=1 into the formula D=b2−4ac.D=(1)2−4×5×1D=1−20D=−19