440,374 views
35 votes
35 votes
I’ve tried to do it but i’m confused and need someone to show me.

I’ve tried to do it but i’m confused and need someone to show me.-example-1
User FolksLord
by
3.1k points

1 Answer

23 votes
23 votes

From the given question,


x^4+9x^2

Now,

Put x=-3 into the given expression


x^4+9x^2=(-3)^4+9(-3)^2
\begin{gathered} x^4+9x^2=(-3)^4+9(-3)^2 \\ =81+9(9) \\ =81+81 \\ =162 \end{gathered}

Hence, the option D is correct.

User Rea
by
2.9k points