Question

Solve the equation. 9x2 + 4 = 0

Answer 1

Answer: $x = \frac{2}{3}i , -\frac{2}{3}i$

Step-by-step explanation:

9x² + 4 = 0

       -4   -4

9x²       = -4

   $\frac{9x^{2} }{9} = \frac{-4}{9}$

    x² = $\frac{-4}{9}$

   $\sqrt{x^{2} } = \sqrt{-\frac{4}{9} }$

    $x = +/- \frac{2}{3}i$