Question

Given(x)=mx3+m2x2+m3x-m4,find p(m).

Answer 1

$p(x) = m {x}^{3} +{m}^{2} {x}^{2} + {m}^{3}x - {m}^{4} \\ p(m) = m {m}^{3} + {m}^{2} {m}^{2} + {m}^{3} m - {m}^{4} \\ = { m }^{4} + {m}^{4} + {m}^{4} - {m}^{4} \\ = 2 {m}^{4}$