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If x : y = 5 : 1, then (4x2 – 22xy + 10y2) is equal to

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If x : y = 5 : 1, then (4x2 – 22xy + 10y2) is equal to
1). 4/5
2). 3/8
3). 0
4). 10


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1 answers

7 vote
Answered by on | Votes 7 |

x/y = 5 ⇒ x = 5y

∴ 4x2 – 22xy + 10y2 put x = 5y in this equation

⇒ 100y– 110y2 + 10y2 = 0

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