Question 330627
Is it 10^7 or 10^(-7)? 
Your explanation is a bit confusing.
If it's positive 7 then it's like multiplying by 10000000, 88300000.
If it's negative 7 then it's like multiplying by 10000000, 0.000000883.
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Substitute (-2) wherever you see an x.
{{{f(x)=2x^2-5x+1}}}
{{{f(-2)=2(-2)^2-5(-2)+1}}}
Work that through and you'll have your answer.