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Salah satu faktornya adalah (2x-3) Jadi jawabannya A
(-b + √b² - 4ac) / 2a dan (-b - √b² - 4ac) / 2a
-6x² + 19x -15
(=) 6x² - 19x + 15
a = 6
b = -19
c = 15
(-b + √b² - 4ac) / 2a
(=) -(-19) + √(-19)² - 4.6.15 / 2(6)
(=) 19 + √361 - 360 / 12
(=) 19+1 / 12
(=) 20 / 12
(=) 5/3
(-b - √b² - 4ac) / 2a
(=) 19-1 / 12
(=) 18/12
(=) 3/2
x = 5/3
3x = 5
3x - 5 = 0
x = 3/2
2x = 3
2x - 3 = 0
jadi faktor-faktornya :
(3x - 5)(2x - 3)