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a = m - 5 ; b = - 4m ; c = m - 2
syarat 1
m - 5 > 0
m > 5
syarat akar² positif , D > 0
D > 0
b² - 4.a.c > 0
(-4m)² - 4(m - 5)(m - 2) > 0
16m² - 4 (m² - 7m + 10) > 0
16m² - 4m² + 28m - 40 > 0
12m² + 28m - 40 > 0
3m² + 7m - 10 > 0
(3m + 10)(m - 1) > 0
m < - 10/3 ; atau m > 1
irisan kedua syarat , merupakan Hp
m < - 10/3 ; atau x > 5