REGINELANGGAM9IN REGINELANGGAM9IN Math Answered 19.These are the values of the variable/s that make quadratic equations true. * a. Roots b. discriminantc. imaginary number d. expression 20.This method is used by dividing the middle term by 2 and squaring me. * a. Extracting Square Roots b. Completing the Squarec. Factoring d. Quadratic Formula 21.It is applying the square root property as a means of solving quadratic equation. * a. Extracting Square Roots b. Completing the Squarec. Factoring d. Quadratic Formula