Question

Solve t^2a=t^2e−r for t }e-r" alt="t^{2}a=t^{2}e-r" align="absmiddle" class="latex-formula">

Answer 1

$\bf t^2a=t^2e-r\implies t^2a-t^2e=-r\implies t^2(a-e)=-r \\\\\\ t^2=\cfrac{-r}{a-e}\implies t=\pm\sqrt{\cfrac{-4}{a-e}}$