19. Which of the following shows the relationship between the coefficients and the sum of the roots of quadratic equation? A. -b/a B. b/a C.-Cla D. c/a 20. Which of the following shows the relationship between the coefficients and the product of the roots of quadratic equation? A. -b/a B. b/a C.-Cla D. c/a 21. The product of the roots of a quadratic equation is
21. What could be the equation if one of its roots is -7 ? A.X2 - 10x -21 = 0 C. x2 - 10x + 21 = 0 B. X2 + 10x + 21 = 0 D. x2 + 10x - 21 = 0 - -
22. The sum and product of two consecutive numbers are 31 and 240 respectively. What i the smaller number? A.11 B. 13 C. 15 D. 17
23. The product of the roots of the quadratic equation 2x2 + 5x - 7 = 0 is A. 5/2 C. – 5/2 B.-7/2 D. 7/2 cole at all times​