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Verified answer
1) x²+6x+8=0(x+4) (x+2) =0
x= -4 atau x = -2
Hp { x| x = -4 atau x = -2 }
2) 2x² +3x -2 < 0
( 2x-1) (x+2) < 0
(2x-1) (x+2) =0
x = 1/2 atau x = -2
__+++__-2__---__½__+++__
tanda lebih kecil pilih yang negatif
Hp { x | -2<x< ½ }