Question

Please help me!! Will get brainliest!!

Answer 1

First, subtract 42 from both sides:
$3w^2 = -36$

Isolate w:
$w^2 = \frac{-36}{3}$
$w^2 = -12$

Solve for w:
$w = + \sqrt{-12} = 2i \sqrt{3}$
and
$w = - \sqrt{-12} = -2i \sqrt{3}$

So your answers are above.