Question

if x2+y2=65 and xy=28, then find x-
y ​

Answer 1

Answer:

$(x-y)^{2} + 2xy = 65\\(x-y)^{2} + 2 * 28 = 65\\(x-y)^{2} + 56 = 65\\(x-y)^{2} = 65 - 56\\(x-y)^{2} = 9\\(x-y) = \sqrt{9\\}\\(x-y) = 3$

Step-by-step explanation: