Question

what are the solution(s) to the quadratic equation 9x^2 = 4? a. x = 4/9 and x = -4/9 b. x = 2/3and x = -2/3 c. x = 3/2 and x = -3/2 d. no real solution

Answer 1

$9x^2 = 4 \\ x^2 = \frac{4}{9} \\ x= \pm \sqrt{ \frac{4}{9} } \\ x= \pm \frac{2}{3}$
solution is x = 2/3 and x = -2/3