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If 4pxy = (x + 2y)2 - (x - 2y)2, then what will be the value of p?

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If 4pxy = (x + 2y)2 - (x - 2y)2, then what will be the value of p?
1). 0.5
2). 0.25
3). 4
4). 2


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3 vote
Answered by on | Votes 3 |

(a + b)2 - (a - b)2 = 4ab

⇒ (x + 2y)2 - (x - 2y)2 = 8xy

⇒ 4pxy = 8xy

⇒ p = 2

∴ p = 2

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