tentukan akar akar persamaan kuadrat berikut dengan cara memfaktorkan
a.) x² - 7x - 60 = 0
(x - 12) (x + 5) = 0
x - 12 = 0 V x + 5 = 0
x1 = 12 V x2 = -5
b.) 2x² - 11x + 15 = 0
(2x - 5) + (x - 3) = 0
2x - 5 = 0 V x - 3 = 0
x1 = 5/2 V x2 = 3
c.) x² - 22x + 40 = 0
(x - 20) (x - 2) = 0
x - 20 = 0 V x - 2 = 0
x1 = 20 V x2 = 2
d.) 4x² + 7x - 11 = 0
(4x - 11 ) (x + 1) = 0
4x - 11 = 0 V x + 1 = 0
x = 11/4 V x = -1
e.) 5x² + 17 + 6 = 0
(5x + 2) (x + 3) = 0
5x + 2 = 0 V x + 3 = 0
x = -2/5 V x = -3
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