Question

formula method 9x²=4​

Answer 1

Answer:

$x =$ ±$\frac{2}{3}$

Step-by-step explanation:

$9x^2 = 4$

$=>9x^2 - 4 = 0$

$=>(3x)^2 - (2)^2 = 0$

$=>(3x + 2)(3x - 2) = 0$  [using the identity $a^2 - b^2 = (a + b)(a - b)$]

$=> 3x + 2 = 0, x = - \frac{2}{3}$

or, $=> 3x - 2 = 0, x = \frac{2}{3}$

∴ $x =$ ±$\frac{2}{3}$