Question

If D = t +9t2 and C = t - t - 8, find an expression that equals D - 3C in standard form?

Answer 1

we have

$\begin{gathered} D-3C=t+9t^2-3(t-t-8)=t+9t^2-3(-8) \\ =t+9t^2+24 \end{gathered}$

in standard form

$9t^2+t+24$