Question

X+y=9 x×y=27 what is the value of x and y​

Answer 1

Explanation:

x+y = 9 and xy = 27 or y = 27/x sub this into the first equation

x + 27/x = 9

x^2 + 27= 9x

x^2 -9x + 27 = 0 Quadratic formula shows x = 9/2 +- 3 sqrt(3) i/ 2

so x = 9/2 - 3 sqrt(3) / 2 y = 9/2 + 3 sqrt (3) i ( or vica versa)