Question

Nilai xy jika x dan y memenuhi persamaan x2 + y2 = 34 dan x2 - y2 = 16 adalahtolong jawabannya beserta penyelesaiannya

Answer 1

X2+y2=34 | kali 1| x2+y2=34
x2-y2=16 | kali 1 | x2-y2=16
__________ _
2y2=18
y2=18÷2
y2= 9
y = 3

x2+y2=34 | kali 1| x2+y2=34
x2-y2=16 | kali -1|- x2+y2=-16
__________ _
2x2 = 50
x2 = 25
x = 5