rozłóż na czynniki wielomian -5x^3-10x^2+32x+16=0
W(2)=0
-5x^3-10x^2+32x+16 : (x-2) = -5x^2-20x-8
5x^3-10x^2
--------------
-20x^2+32x
20x^2-40x
-------------
-8x+16
8x-16
------------
========
(-5x^2-20x-8)(x-2)=0
Δ= 400-4*(-5)*(-8)
Δ=240 √Δ= 4√15
x1= (20-4√15)/(-10)
x1= (10-2√15)/-5
x2= (20+4√15)/-10
x2= (10+2√15)/-5
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W(2)=0
-5x^3-10x^2+32x+16 : (x-2) = -5x^2-20x-8
5x^3-10x^2
--------------
-20x^2+32x
20x^2-40x
-------------
-8x+16
8x-16
------------
========
(-5x^2-20x-8)(x-2)=0
Δ= 400-4*(-5)*(-8)
Δ=240 √Δ= 4√15
x1= (20-4√15)/(-10)
x1= (10-2√15)/-5
x2= (20+4√15)/-10
x2= (10+2√15)/-5