Question

Simplify t^2 - 4t - 21 / t + 3

Answer 1

t^2-7t+3t -21/t+3)

= t(t-7)+3(t-7)/(t+3)
= (t-7)(t+3)/(t+3)

= (t-7)

Answer 2

\[(t^2-4t-21)=(t+3)(t-7)\]\[[(t+3)(t-7)]/(t+3)=t-7\]