Solve for n n=(t^2-t)/2 - Math solver

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$n = \frac{t^{2} - t}{2}$

Factor $t$ out of $t^{2}$ .

$n = \frac{t \cdot t - t}{2}$

Factor $t$ out of $- t$ .

$n = \frac{t \cdot t + t \cdot - 1}{2}$

Factor $t$ out of $t \cdot t + t \cdot - 1$ .

$n = \frac{t (t - 1)}{2}$

Solve for n n=(t^2-t)/2