Question

What is the solution set for

3x 2 + 48 = 0 ?
O {6.9, -6.9}
O {4, -4}
O {21, -21]
O {41 , -4; }

Answer 1

{ 4i, - 4i }

Explanation:

Given

3x² + 48 = 0 ( subtract 48 from both sides )

3x² = - 48 ( divide both sides by 3 )

x² = - 16 ( take the square root of both sides )

x = ±
`√(-16)` = ± 4i

solution set is { - 4i, 4i }