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Answer:
[tex] \huge{f( - 2) = 23}[/tex]
Step-by-step explanation:
To find f(-2) substitute the value of x that's -2 into f(x) and solve
We have
[tex]f( - 2) = ({ - 2})^{4} + 2 ({ - 2})^{2} - 1 \\ = 16 + 2(4) - 1 \\ = 15 + 8 \\ = 23 \: \: \: \: \: \: \: [/tex]
Hope this helps you