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Maka,
(-(m-3))² - 4(1)(m+2) = 0
(m-3)² - 4(m+2)
m² - 6m + 9 - 4m - 8 = 0
m² - 2m + 1 = 0
(m - 1)² = 0
m - 1 = 0
m = 1
Maka, nilai yang memenuhi adalah m = 1