Answers

2014-01-16T21:13:04+08:00
X + y = 19 --->> can be written as y = 19-x
x^2 + y^2 = 205
x^2 + (19-x)^2 = 205
x^2 + 361 - 38x + x^2 = 205
2x^2 - 38x + 156 = 0
x=13
x=6

Therefore the solution is:
1) x= 13, y=6
or
2) x=6, y=13
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