ATQ, We know that, (a- b)2 = (a + b2 - 4ab So, (2x - y)2 = (2x + y)2 - 4 × 2xy = 152 - 8 × 18 = 225 - 144 = 81 So, we can say that, (2x - y) = - 9, or, 9. Since, all the given options are positive, so we will consider the positive value of (2x - y) , as (2x + y) is given positive. We know that, a2 - b2 = (a + b) × (a - b) So, 4x² - y² = (2x)2 - y2 = (2x + y) × (2x - y) = 15 × 9 = 135 Alternate solution Through trial and error, we can observe that x = 6 and y = 3. So, required value = {4 × (6)2 - 32 } = (4 × 36) - 9 = 135
Statement:
Only Asha is Jeenat
Some Asha are Charu
Some Charu are not Yash
Conclusion:
I. Some Yash are As...
Statement
Only a few Green is Red
No Red is White
All White is Black
Conclusion
I) Some Red is Blac...
Who among the following is travelling by Skoda car?
Statements:
Some Mountains are not Rivers.
All Rivers are Hills.
Only a few Hills are Oceans.
Conclusions:
<...In each question below are given two statements followed by two conclusions numbered I and II. You have to take the two given statements to be true eve...
Statements:
No number is a symbol.
No symbol is a letter.
No letter is a draft.
Conclusions:
I. No number is dr...
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be tru...
Statements: Some winters are summers.
All summers are springs.
All springs are seasons.
<...
Statement:
I) No A is B
II) No B is C
III) Some D are C
IV) All D are E
Conclusion:
I) Some E are not D
II) Some A are C
III) No C is A
All foxes cannot be huts. No look is a hut.
