Question

resolva os sistemas:

a) x2+y2=5
x2-y2=1


b) x2+y2=13
x.y=6

*Me Ajudem!

Answer 1

a)
×2+y2=5
x2-y2=1

5-1=4

b)
×2+y2=13
x.y=6

13.(+6)
13.6=78