Resolva o sistema:
x . y = - 180
x + y = 3
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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
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
milena13078:
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