4. Which of the following quadratic equations has the roots +8? A. X-16=0 B. 2x - 64= 0 C.X = 128 D.X? - 27 =37 5. Which of the following is best solved using extracting square root method? A. X+4x+5 = 0 B.7x2 = 10x C. x2+x=0 D. X = 81 6. The number to be added to make the left side of the equation 5x2 - 10x = 15 a perfect square trinomial is A 1 B.5 C. 25 D. 225 7. Express ine left side of x2 – 3x + 2 = 0 as a square of a binomial. A. (x-3) = 0 + = 0 = 0 8. Which of the following is the solution of the quadratic equation 2x2 +5 = 8x? tv5 40V6 Stvz A. x= B.X= 8316 C. = D. = 2 1 9. Which of the following represents the values of a, b, and c, respectively in the quadratic equation 2x2 + 5 = 8x? A. 2, 5, 8 B. 2,5, -8 C. 2, 8,5 D. 2, -8,5 10. The values of a, b, and c in the equation x2 + x = 0 are A. a= 2,b= 5,0 = -3 C. a = 15, b = -6,0 = 3 B. a= 6, b = -15,c = 2 D. a = 6,b= 15,c = -2 - 10 4 2​