Question

Solve by factoristion method:
$t^2-49=0$.

Answer 1

$t^2-49=0$
$\therefore$ ${\left(t\right)}^2-{\left(7\right)}^2=0$
$\therefore$ $(t-7)(t+7)=0$
$\therefore$ $t-7=0$ or $t+7=0$
$\therefore$ $t=7$ or $t=-7$
Solution set: $t=7,t=-7$