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b)-6x⁵-2x⁴+2x³+8x²-16x+14
c)18x⁸+18x⁷-17x⁶+12x⁵+32x⁴+30x³-100x²+104x-48
3x³ + 2x² -4x +6 +6x⁵ + 2x⁴ + x³ - 6x² +12x - 8 = 6x⁵ + 2x⁴ +4x³- 4x²+8x -2
b) w(x) - u(x) =
3x³ + 2x² -4x +6 - 6x⁵ - 2x⁴ - x³ +6x² -12x + 8 = - 6x⁵ - 2x⁴ +2x³ + 8x² -16x +14
c) w(x) * u(x) =
(3x³ + 2x² -4x +6)(6x⁵ + 2x⁴ + x³ - 6x² +12x - 8)=
18x(do osmej) + 6x(do 7) + 4x³ -18x (do piatej)+36x²-24x³+12x(do siodmej) +4x (do 6) +2x (do 5)-4x²+24x³-16x²-24x(do 6)-8x (do 5 ) -4x ( do 4) +24x³-48x²+32x +36x(do 5) +12x (do 4) +6x³ -36x² +72x - 48 = 18x ( do 8) +18x (do 7) -20x (do 6) +12x (do 5) +8x (do4) +34x³-68x² +104x-48