Question

Solve the given quadratic equation by factorization method
$x^2-9=0$

Answer 1

Given : $x^2-9=0$
$\Rightarrow (x-3)(x+3)=0\Rightarrow x-3=0orx+3=0$
$\Rightarrow x=3orx=-3\Rightarrow x=\pm 3$
Thus, $x=3$ and $x=-3$ are roots of the given equation.