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OpenStudy (anonymous):
Find f(-2) if f(x)=x⁴+2x²-1
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jimthompson5910 (jim_thompson5910):
\[\Large f(x) = x^4+2x^2-1\] \[\Large f(-2) = (-2)^4+2(-2)^2-1\] \[\Large f(-2) = 16+2(4)-1\] \[\Large f(-2) = 16+8-1\] \[\Large f(-2) = 23\]
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