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9. Which set is countable? • [0, 1] • The irrational numbers. • P(Z)
If p(x)=x4+x3+x2-1 and q(x)=-2x3+x2+x+1, which expression is equivalent to (p-q)(x)?
i) x4-x3+2x2+x,
ii)3x3-x-2,
iii)x4+3x3-2-x,
iv)x4+3x3+x2-2.
If p(x)=x2-1 and q(x)=2x-1
then find an expression for (p-q)(x) and (poq)(x)?
