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(x + 1) (x - 1) = 0
x + 1 = 0 atau x - 1 = 0
x = -1 x = 1
b) 4x² + 4x + 1 = 0
(2x + 1) (2x + 1) = 0
2x + 1 = 0
2x = -1
x = -1/2
c) -3x² - 5x + 2 = 0
(-3x + 1) (x + 2) = 0
-3x + 1 = 0 atau x + 2 = 0
-3x = -1 x = -2
x = 1/3
d) 2x² - x - 3 = 0
(2x -3) (x + 1) = 0
2x - 3 = 0 atau x + 1 = 0
2x = 3 x = -1
x = 3/2
e) x² - x + 1/4 = 0
(x - 1/2) (x - 1/2) = 0
x - 1/2 = 0
x = 1/2
semoga membantu ya :)