Quiz Discussion

Find the roots of the quadratic equation: 2x² + 3x - 9 = 0?

• 1]

  3, -3/2

• 2]

  3/2, -3

• 3]

  -3/2, -3

• 4]

  3/2, 3

 If a and b are the roots of the equation x² - 9x + 20 = 0, find the value of a² + b² + ab?

• 1]

  -21

• 2]

  21

• 3]

  1

• 4]

  61

Find the roots of the quadratic equation: x² + 2x - 15 = 0?

• 1]

  -5, 3

• 2]

  3, 5

• 3]

  -3, 5

• 4]

  -3, -5

A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is

• 1]

  2 mph

• 2]

  2.5 mph

• 3]

  3 mph

• 4]

  4 mph

If the roots of the equation 2x² - 5x + b = 0 are in the ratio of 2:3, then find the value of b?

• 1]

  3

• 2]

  4

• 3]

  5

• 4]

  6

The sum of the square of the three consecutive even natural numbers is 1460. Find the numbers?

• 1]

  18, 20, 22

• 2]

  20, 22, 24

• 3]

  22, 24, 26

• 4]

  24, 26, 28

The sum of the squares of two consecutive positive integers exceeds their product by 91. Find the integers?

• 1]

  9,10

• 2]

  10,11

• 3]

  11,12

• 4]

  12,13

The sum and the product of the roots of the quadratic equation x² + 20x + 3 = 0 are?

• 1]

  10, 3

• 2]

  -10, 3

• 3]

  -20, 3

• 4]

  -10, -3