d. (3m+10n) (3m-10n) d. 225 21. What are the factors of 9m2 - 100 n?? a. (3m-10) (3m-10) b.(3m+10) (3m+10) C. (3m-10) 22. What value of c will make the trinomial x2-30x +c a perfect square? a. 144 b. 169 c. 196 23. Solve the quadratic equation x2 = (2x+1)? a. -1, -3 b. -.- c. , - 24. Which of the following has no real solution? a. 14x2-7x = 0 b. x2-6x+5 = 0 c. 6x2-3x-1=0 1 d.-1 3 3 d. 3x2-2x+1=0 d. 30 C. 40 d. 3 X d. -X2-6x-9=0 25. Find the value of x if the area of the square is 900cm?. a. 50 b. 20 26. What is the constant of the quadratic equation 7m2 - 4m + 3 = 0? a. 7m2 b. -4m c. 7m 27. What is the quadratic equation formed when we simplify += 2 ? a. XP-6X+9=0 b. x2 +6x+9=0 C. XP-6x-9=0 28. Find the quadratic equation whose roots are 5 and -2. a. x2-3x-10 = 0 b. x2+3x-10 = 0 C. x2-3x+10 = 0 29. What is the sum of the roots of x2-4x-5=0? a. -6 b. -4 c. 4 30. For which value of k will the equation x2+ kx +3 = 0 have no solution? b.-5 in quadratic equation x=256. d. x+3x+10 = 0 d. 6 d. 4 c. 3 a. -6
