Discussion
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- Question
- ?. ? 784x + 1234 = 1486
?. ? 1089y + 2081 = 2345
Options- A. 1
- B. 2
- C. 3
- D. 4
- Correct Answer
- 1
ExplanationAccording to question ,we can say that
From equation ?. ?784x + 1234 = 1486
? ?784x = 252
? 28x = 252
? x = 9
From equation ?. ?1089y + 2081 = 2345
? ?1089y = 264
? 33y = 264
? y = 8
? x > y
Thus , required answer will be x > y . - 1.
?. 9 + 19 = ?x ? x ? x
?. y5 - ( 2 × 14 ) 11/2 = 0 ? y
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 2.
?. 12 - 23 = 5?x ? x ? x
?. ? y - 5 ? y = 1 12 12 ? y
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 3. ?. x 2 ? 19x + 84 = 0
?. y 2 ? 25y + 156 = 0
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 4.
The roots of x + 4 + x - 4 = 10 are : x - 4 x + 4 3
Options- A. ± 4
- B. ± 6
- C. ± 8
- D. 2 ± ?3 Discuss
- 5. The quadratic equation with rational coefficients, whose one root is ?5, is :
Options- A. x 2 + 5 = 0
- B. x 2 - 10 = 0
- C. x 2 - 5 = 0
- D. None of these Discuss
- 6. ?. x 3 ? 468 = 1729
?. y 2 ? 1733 + 1564 = 0
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 7. ?. x 2 ? 7x + 12 = 0
?. y 2 + y ? 12 = 0
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 8. ?. x 4 ? 227 = 398
?. y 2 + 321 = 346
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 9. ?. x 2 - 1 = 0
?. y 2 + 4y + 3 = 0
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 10. ?. x 3 - 371 = 629
?. y 3 - 543 = 788
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
Quadratic Equation problems
Search Results
Correct Answer:
Explanation:
Correct Answer: 1
Explanation:
Correct Answer: 4
Explanation:
According to question ,we can say that
From equation ?. x2 ? 19x + 84 = 0
? x2 ? 7x ? 12x + 84 = 0
? (x ? 7)(x ? 12) = 0
? x = 7, 12
From equation ?. y2 ? 25y + 156 = 0
? y2 ? 13y ? 12y + 156 = 0
? (y ? 13)(y ? 12) = 0
? y =12, 13
? x ? y
From above it is clear that x ? y is correct answer .
Correct Answer: ± 8
Explanation:
Correct Answer: x 2 - 5 = 0
Explanation:
As per the given above question , we have
Let k1 and k2 be the roots of quadratic equation .
One root is k1 = ?5
So the other root is k2 = ? ?5
? Sum of the roots = k1 + k2 = ?5 + ( -?5 ) = 0
and product of the roots = k1 × k2 = ? (?5) (- ?5) = ?5
? Required equation is x2 - (sum of the roots)x + (product of the roots) = 0
? x2 - 5 = 0.
Correct Answer: 2
Explanation:
According to question,
From equation ?. x3 ? 468 = 1729
? x3 = 2197 = 133
? x = 13
From equation ?. y2 ? 1733 + 1564 = 0
? y2 = 169 = 132
? y = ±13
Thus , x ? y is required answer .
Correct Answer: 2
Explanation:
From the given equations , we can say that
From equation ?.
x2 - 7x + 12 = 0
? x2 - 4x - 3x + 12 = 0
? x( x - 4 ) - 3( x - 4 ) = 0
? ( x - 3 )( x - 4 ) = 0
? x = 3 or x = 4
From equation ?.
y2 + y - 12 = 0
? y2 + 4y - 3y - 12 = 0
? y( y + 4 ) - 3( y + 4 ) = 0
? ( y - 3 )( y + 4 ) = 0
? y = 3 or y = - 4
From above both equations it is clear that x ? y is correct answer .
Correct Answer:
Explanation:
According to question ,we can say that
From equation ?. x4 = 398 + 227 = 625
? x4 = 54
From equation ?. y2 = 346 - 321 = 25
? y2 = 52
Correct Answer: 2
Explanation:
From the given equations , we know that
?. x2 - 1 = 0
? x2 = 1
? x = ± ?1 = ± 1
?. y2 + 4y + 3 = 0
? y2 + y + 3y + 3 = 0
? y( y + 1) + 3( y + 1) = 0
? ( y + 1) ( y + 3)
? y = -3 or -1
From above equations it is clear that x ? y is correct answer .
Correct Answer: 3
Explanation:
According to given question , we have
?. x3 - 371 = 629
? x = ?1000 = 10
?. y3 - 543 = 788
? y = ?1331 = 11
From above both equations it is clear that x < y is correct answer .
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