# Quiz Discussion

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

Course Name: Quantitative Aptitude

• 1]

-21

• 2]

21

• 3]

1

• 4]

61

##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

One root of the quadratic equation x2 - 12x + a = 0, is thrice the other. Find the value of a?

• 1]

29

• 2]

-27

• 3]

28

• 4]

27

##### Solution
2
Discuss

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

##### Solution
3
Discuss

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

##### Solution
4
Discuss

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

##### Solution
5
Discuss

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

• 1]

-5, 3

• 2]

3, 5

• 3]

-3, 5

• 4]

-3, -5

##### Solution
6
Discuss

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

##### Solution
7
Discuss

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

##### Solution
8
Discuss

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

# Quiz