Question

I. 2y2 - 15y + 18 = 0

II. 2x2 + 9x - 18 = 0

A if x>y Correct Answer Incorrect Answer
B if x≤y Correct Answer Incorrect Answer
C if x Correct Answer Incorrect Answer
D if x≥y Correct Answer Incorrect Answer
E if x=y or the relationship cannot be established. Correct Answer Incorrect Answer

Solution

I. 2y2 - 15y + 18 = 0 2y2 - 3y - 12y + 18 = 0 y (2y - 3) - 6 (2y - 3) = 0 y = 6, 3/2 II. 2x2 + 9x - 18 = 0 2x2- 3x + 12x - 18 = 0 x (2x - 3) + 6 (2x - 3) = 0 x = - 6, 3/2 Hence, x ge; y

Practice Next
×
×