Solve for X by factorisation

Suppose you have $x^2 - 4 = 0$ , how you would solve $x$ for by factorisation.

Factor the expressions on the LHS

$(x - 2)(x + 2) = 0$

Break down the equation into 2 and each side equate it to $0$.

$x - 2 = 0$ or $x + 2 = 0$

$\therefore$ $x = 2$ $or$ $x = -2$

Note : LHS = LEFT HAND SIDE