Which of these potential solutions make the equation x2+9=0 true?(1 point)
Responses
{3i,−3i}
left brace 3 i comma negative 3 i right brace
{−3,−3i}
left brace negative 3 comma negative 3 i right brace
{3,−3}
left brace 3 comma negative 3 right brace
{ }
left brace right brace