Question

please solve fast please​

Answer 1

Answer:

x-y=±3

Step-by-step explanation:

$x+y=5\\xy=4\\\\(x+y)^2=5^2\\x^2+y^2+2xy=25\\x^2+y^2+2xy-4xy=25-4xy\\x^2+y^2-2xy=25-4(4)\\(x-y)^2=25-16\\x-y=\sqrt{9}\\x-y=\pm3$

Hope it helps!

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