rozwiąż równanie
x^4 - 3x^3+4x^2-6x+4=0
Sporządz wykres funkcji
y=3x+2/x-2
x4 + 2x2 - 3x3 - 6x + 2x2 +4 = 0
( x4 +2x2) -( 3x3 +6x) +( 2x2 +4)= 0
x2( x2 +2) - 3x( x2 +2) + 2( x2 +4)= 0
( x2 +2)( x2 - 3x +2) = 0
( x2 +2) ( x2 - 2x - x +2)= 0
( x2 +2)[ x( x -2) - ( x -2) ]= 0
( x2 +2)( x - 2)( x - 1) = 0
x = 2
x = 1
x2 +2 ≠0
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x4 + 2x2 - 3x3 - 6x + 2x2 +4 = 0
( x4 +2x2) -( 3x3 +6x) +( 2x2 +4)= 0
x2( x2 +2) - 3x( x2 +2) + 2( x2 +4)= 0
( x2 +2)( x2 - 3x +2) = 0
( x2 +2) ( x2 - 2x - x +2)= 0
( x2 +2)[ x( x -2) - ( x -2) ]= 0
( x2 +2)( x - 2)( x - 1) = 0
x = 2
x = 1
x2 +2 ≠0