Tell me all these questions one by one
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Answer:
Step-by-step explanation:
1. X³-x²+x+1
P(1) = (1)³-(1)²+1+1
= 1-1+1+1 = 2
P(-1) = (-1)³-(-1)²-1+1
=-1-1-1+1 = -2
9. 2157/625 = 2157/5*4
=2157×(2)*4 / 5*4 ×2*4
=2157×16 ÷ (10)*4
=34512 / 10000 = 3.4512
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