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_________
x2 -4
( 3x + 1 ) ( x - 2 )
_______________
( x-2 ) ( x +2 )
3x +1
______
x + 2
2 . di faktorkan
x ( x -2 ) kali x ( x + 1 )
______________________
(x+1)(x+3) kali ( x-2 )
coret yg sama atas bawah
jadi
x2
_____
x+3
2.x²-2x . x²+x=x².x²+x².x-2x.x²-2x.x
=x4+x³-2x³-2x²
=x4-x³-2x²
3.x²+4x+3 . x-2=x².x+x².-2+4x.x+4x.-2+3.x+3.-2
=x³-2x²+4x²-8x+3x-6
=x³+2x²-5x-6