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- Question
The two roots of a quadratic equation are given as x = 1/7 and x = -1/8 . The equation can be written as:
Options- A. (7x ? 1)(8x ? 1) = 0
- B. (7x ? 1)(8x + 1) = 0
- C. (7x + 1)(8x ? 1) = 0
- D. (7x + 1)(8x + 1) = 0
- Correct Answer
- (7x ? 1)(8x + 1) = 0
- 1. The zeros of the cubic polynomial 2x3-x2-2x+1 are a, b and c respectively. Find a+b+c :
Options- A. -1
- B. 2
- C. 1
- D. none Discuss
- 2. Solve the following equation to find x: (x ? 2)2 ? 36 = 0 : x?N
Options- A. 4
- B. 8
- C. -4
- D. -8 Discuss
- 3. What is the value of (sin60° + 2/?3) ?
Options- A. (2?3+1)/?3
- B. 7/2?3
- C. 3
- D. 2+?3 Discuss
- 4. What is the y ? intercept of the linear equation 59x + 14y ? 112 = 0?
Options- A. 8
- B. 14
- C. 28
- D. 59 Discuss
- 5. What should come in place of question mark (?) in the following question? 1234 + 2345 ? 3456 + 4567 = ?
Options- A. 4590
- B. 4680
- C. 4670
- D. 4690 Discuss
- 6. Reflection of the point (2,7) in the yaxis is
Options- A. (2,7)
- B. (-2,-7)
- C. (-7,2)
- D. (7,2) Discuss
- 7. 6.651 - (148.6 - x ) - 57.22 = 6.098. Find x.
Options- A. 205.267
- B. 90.827
- C. -91.933
- D. 218.569 Discuss
- 8. If one more cobbler is hired the output of a shoe making unit will increase from 50 pairs of shoes to 55 pairs per day, but then the shoe making unit will have to reduce the price of a pair of shoes from Rs 3200 to Rs 3000 per pair to sell the additional output, the marginal revenue product of the last cobbler is
Options- A. Rs 1000
- B. Rs 5000
- C. Rs 4000
- D. Rs 200 Discuss
- 9. Coefficient of x in (x + 9)(8 - 5x) is
Options- A. 37
- B. -53
- C. -37
- D. 53 Discuss
- 10. If x - y = -9 and xy = -20, then find x2 + y2 ?
Options- A. 61
- B. 41
- C. 81
- D. 51 Discuss
Simplification problems
Search Results
Correct Answer: none
Correct Answer: 8
Correct Answer: 7/2?3
Correct Answer: 8
Correct Answer: 4690
Explanation:
As per the BODMAS rule, the priority in which the operations should be done is:
| Priority wise operations | Symbol |
| B-Bracket | () |
| O-of | of |
| D-Division | /,÷ |
| M-Multiplication | *,x |
| A-Addition | + |
| S-Subtraction | - |
Note: Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order. ? = 1234 + 2345 ? 3456 + 4567 ? = 3579 - 3456 + 4567 ? = 123 + 4567 ? = 4690
Correct Answer: (-2,-7)
Correct Answer: 205.267
Correct Answer: Rs 5000
Correct Answer: -37
Correct Answer: 41
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