Question

Dane sa wielomiany

W(x)=2x do 3-7x do 2 -5x +4

P(x) =2x-1

oblicz

a)W(x)+3razy P(x)

b)W(x)-P(x)

Answer 1

W(x) = 2 x^3 - 7 x^2 - 5 x + 4

P(x) = 2x - 1

zatem

a)

W(x) + 3 P(x) = 2 x^3 - 7 x^2 - 5 x + 4 + 3*(2x - 1) =

= 2 x^3 - 7 x^2 - 5 x + 4 + 6 x - 3 = 2 x^3 - 7 x^2 + x + 1

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b)

W(x) - P(x) = 2 x^3 - 7 x^2 - 5 x + 4 - ( 2x - 1 ) =

= 2 x^3 - 7 x^2 - 5 x+ 4 - 2 x + 1 =

= 2 x^3 - 7 x^2 - 7 x  + 5

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