Wykonaj działania na wielomianach, wiedząc, że W(x) = 2x-3, Q(x)=x do kwadratu+5x-1 oraz R(x)= x do potęgi 3
a) W(x) + 2Q(x)
b) R(x)- [ W(x) * Q(x)]
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W(x) = 2x -3
Q(x) = x^2 +5x -1
R(x) =x^3
a) W(x) + 2Q(x)
2x -3 + 2(x^2 +5x -1) = 2x- 3+2x^2 + 10x -2 = 2x^2 + 12x = 5
b)R(x)- [ W(x) * Q(x)]
x^3 - [ (2x - 3)( x^2 +5x -1)] = x^3 - [2x^3 + 10x^2 - 2x - 3x^2 - 15x + 3]=
= x^3 -2x^3 - 10x^2 + 2x +3x^2 +15x - 3 = - x^3 - 7x^2 + 17 x -3