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(7n + 10) (7n - 10) = 0
n = - 10/7 atau n = 10/7
2) 2q² + 3q - 35 = 0
(2q - 7) (q + 5) = 0
q = 7/2 atau q = -5
3) 6q² + 7q - 20 = 0
(3q - 4) (2q + 5) = 0
q = 4/3 atau x = -5/2
semoga membantu ya :)