Question

What are the solution(s) to the quadratic equation 9x2 = 4?

x = StartFraction 4 Over 9 EndFraction and x = StartFraction negative 4 Over 9 EndFraction
x = StartFraction 2 Over 3 EndFraction and x = StartFraction negative 2 Over 3 EndFraction
x = StartFraction 3 Over 2 EndFraction and x = StartFraction negative 3 Over 2 EndFraction
no real solution

Answer 1

9x^2 = 4
x^2 = 4/9
x = ±√(4/9) = ±(2/3)

So the solutions are x = 2/3 and x = −2/3.