1) x^2 - 9 = x^2 = x = ±3
2) 121 - x^2 = x^2 = 12x = ±11
3) y^2 - 4 = y^2 = y = ±2
4) 1.96 - y^2 = y^2 = 1.9y = ±√1.9y = ±1.4
1) x^2 - 9 =
x^2 =
x = ±3
2) 121 - x^2 =
x^2 = 12
x = ±11
3) y^2 - 4 =
y^2 =
y = ±2
4) 1.96 - y^2 =
y^2 = 1.9
y = ±√1.9
y = ±1.4