Quadratic Equations and Simultaneous Equations MCQs - Math Test 9

MCQ: Value of b² - 4ac determines nature of roots, for not-real roots, b² - 4ac is:

1. lesser than 0
2. equal to 0
3. greater than 0
4. None of the above

MCQ: Sum of roots of a quadratic equation is equal to:

1. -b ⁄ 2a
2. -2b ⁄ a
3. -b ⁄ a
4. b ⁄ a

MCQ: Length of line joining two points (x1, y1) and (x2, y2) is:

1. (x2 - x1) + (y2 - y1)
2. ?((x2 - x1) + (y2 - y1))
3. ?((x2 - x1)² + (y2 - y1)²)
4. (y2 - y1) ⁄ (x2 - x1)

MCQ: Coordinates of midpoint of line joining two points (x1, y1) and (x2, y2) are:

1. ((x2 - x1) ⁄ 2, (y2 - y1) ⁄ 2)
2. ((x2 + x1) ⁄ 2, (y2 + y1) ⁄ 2)
3. ((x2 - x1), (y2 - y1))
4. ((x2 + x1), (y2 + y1))

MCQ: Coordinates of midpoint of line joining two points (1, 2) and (4, 8) are:

1. (2.5, 10)
2. (5, 5)
3. (5, 10)
4. (2.5, 5)