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  1. If x : y = 2 : 1, then (5x² – 13xy + 6y²) is equal to
    1. 3
      4
    2. 4
      3
    3. 0
    4. 55
      4
Correct Option: C

x
 = 2 ⇒ x = 2y
y

⇒ x – 2y = 0 ...(i)
∴ 5x² – 13xy + 6y²
= 5x² – 10xy – 3xy + 6y²
= 5x (x – 2y) – 3y (x – 2y)
= (x – 2y) (5x – 3y)
= 0 × (5x – 3y) = 0 [Using (i)]


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