Question

Resolva o sistema:

x . y = - 180
x + y = 3

Answer 1

x+y=3
x=3-y

x*y=-180
3-y*y=-180
-y*y=-180-3
-y^2=-183
y^2=183
y=√183

y=3-x
x*y=-180
x*3-x=-180
x*-x=-180-3
-x^2=-183
x^2=183
x=√183

x*y=-180
x*√183=-180
x=60√183/61 = -√183

x*y=-180
√183*y=-180
y=60√183/61 = -√183