5x^2 + 45 = 05x^2 = -45x^2 = -9x = ±√(-9)x = ±3i
x^2 + 16 = 0x^2 = -16x = ±√(-16)x = ±4i
x^2 - 1/4 = 0x^2 = 1/4x = ±√(1/4)x = ±1/2
5x^2 + 45 = 0
5x^2 = -45
x^2 = -9
x = ±√(-9)
x = ±3i
x^2 + 16 = 0
x^2 = -16
x = ±√(-16)
x = ±4i
x^2 - 1/4 = 0
x^2 = 1/4
x = ±√(1/4)
x = ±1/2