Question

3.
If x2 + 7y2 = 8xy, then find the value of x : y.​

Answer 1

Answer:

x²+7y²=8xy

or, x²-8xy+7y²=0

or, x²- xy- 7xy+ 7y²=0

or, x(x-y)- 7y(x-y) = 0

or, (x-y)(x-7y)=0

Either x-y = 0 or, x-7y = 0

If x-y = 0,

x = y

x : y= x/y = 1

If x-7y=0, x=7y

x : y = x/y = 7y/y = 7

Hence, x:y is either 1 or 7

Answer 2

Answer:

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