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Syarat tidak memepunyai akar real:
D < 0
b² - 4ac < 0
(-2-2m)² - 4(1)(3m+3) < 0
4 + 8m + 4m² -12m -12 < 0
4m² - 4m - 8 < 0
m² - m - 2 < 0
m² - m - 2 = 0
(m - 2)(m + 1) = 0
m1 = 2 dan m2 = -1
kemudian diambil titik nol (0) sebagai titik uji, subtitusikan kedalam
m² - m - 2 < 0
0² - 0 - 2 < 0
-2 < 0 titik uji benar, jadi
HP = { x I -1 < x < 2 }
tidak memepunyai akar real --> D < 0
b² - 4ac < 0
(2+2m)² - 4.1.(3m+3) < 0
4 + 8m + 4m² -12m -12 < 0
4m² - 4m - 8 < 0
m² - m - 2 < 0
(m - 2)(m + 1) = 0
m = 2 atau m = -1
+++++ - - - - +++++ uji m = 0 --> hasil - mka penyelesaian yg -
-1 2
Hp = { x | -1 < x < 2 }
semoga membantu ya :)