answer:
x = ±2
y = 0
step-by-step explanation:
・we can use elimination for this system
x² - y² = 4
x² + y² = 4
・we can cancel out the y²'s since one is positive and the other is negative
2x² = 8
x² = 4
・x = ±2 ( we use ± since squaring -2 or 2 would give us 4 )
・now find y by substituting into either one of the equations!
(±2)² + y² = 4
4 + y² = 4
y² = 0
・y = 0
