If x2 + 9y2 - 6xy = 0, then x : y is equal to:
Answer & explanation
Correct answer: option 3
x2 + 9y2 - 6xy = 0,
⇒ x2 + (3y)2 - 2.x.3y = 0,
⇒ (x - 3y)2 = 0
⇒ x - 3y = 0
⇒ x = 3y
⇒ x : y = 3 : 1
If x2 + 9y2 - 6xy = 0, then x : y is equal to:
Correct answer: option 3
x2 + 9y2 - 6xy = 0,
⇒ x2 + (3y)2 - 2.x.3y = 0,
⇒ (x - 3y)2 = 0
⇒ x - 3y = 0
⇒ x = 3y
⇒ x : y = 3 : 1