Q. For the following quadratic equation, find the discriminant.−7x2+32x−108=−4x2−4xAnswer:
Simplify quadratic equation: First, we need to simplify the given quadratic equation by moving all terms to one side of the equation.−7x2+32x−108=−4x2−4xAdd 4x2 to both sides:−7x2+4x2+32x−108=−4xAdd 4x to both sides:−3x2+36x−108=0
Calculate discriminant: Now that we have the simplified quadratic equation in the form ax2+bx+c=0, we can find the discriminant. The discriminant of a quadratic equation ax2+bx+c is given by the formula D=b2−4ac. For our equation, a=−3, b=36, and c=−108.
Find discriminant value: Let's calculate the discriminant using the values of a, b, and c.D=b2−4acD=(36)2−4(−3)(−108)D=1296−4(3)(108)D=1296−1296D=0