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(2-3t)x²+(4-t)x+2=0D < 0
b² - 4ac < 0
(4-t)² - 4(2-3t).2 < 0
16-8t+t²-16+24t < 0
t²+16t < 0
t(t+16) < 0
t=0 atau t=-16
+++++ - - - - - ++++++ uji t=1 --> 1.17 = 17 (+)
-16 0
tanda < maka penyelesaian yg -----
jadi HP = {t | -16 < t < 0}