Solve for x (complex solution): $x=-\frac{\sqrt{7}i}{3}\approx -0-0.881917104i$
$x=\frac{\sqrt{7}i}{3}\approx 0.881917104i$
Subtract $7$ from both sides. Anything subtracted from zero gives its negation.$$9x^{2}=-7$$
Divide both sides by $9$.$$x^{2}=-\frac{7}{9}$$
The equation is now solved.$$x=\frac{\sqrt{7}i}{3}$$ $$x=-\frac{\sqrt{7}i}{3}$$