Question

If x2 + y2 = 2.5 xy, then x:y is
1:2 b) 2:1 c) 1:1 d) 1:4​

Answer 1

Answer:

x^2 + y^2 = 25 and xy = 12 y = 12x Replace y in first equation x^2 + (12x)^2 = 25 x^4 + 144 = 25x^2 x^4 - 25x^2 + 144 = 0 x^4 - 16x^2 - 9x^2 + 144 = 0 x^2(x^2 ... More