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maka x^2 = 4. x = 2
b. x^2 - 7x +10 = (x-5) (x-2)
maka x = 5 atau x = 2
c. 3x^2 + 5x -2 = (x+6/3) (x-1/3)
maka x = -6/3 = -2 atau x = 1/3
b.(x-5) (x-2)
c.(3x+2) (x-1)
udah aq jamin betul..
semoga membantu.