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P(x)/F(x) wtedy, gdy F(2)=0
F(2)=2³ - (2a+1)·2² +3,5·2 +a²-4=0
8-4(2a+1)+7+a²-4=0
8-8a-4+7+a²-4=0
a²-8a+7=0
Δ=64-4·1·7=64-28=36, √36=6
a₁=(8-6):2=2:2=1
a₂=(8+6):2=14:2=7
odp.a=1 lub a=7
zad.6b
(x-1)²=x²-2x+1
(3x⁴-4x³+1):(x²-2x+1) = 3x²+2x+1
-3x⁴+6x³-3x²
2x³-3x²
-2x³+4x²-2x
x²-2x+1
-x²+2x-1