Question 246717
I assume they are asking you to factor it.
.
{{{t^4-11t^2+18}}}
{{{(t^2-9)(t^2-2)}}}
{{{(t-3)(t+3)(t^2-2)}}}
You could leave it like that or, you could factor the last term as:
{{{(t-3)(t+3)(t-sqrt(2))(t+sqrt(2))}}}