The tangent lines which was drawn at points A and B on the following y = f(x) function graph are parallel to x axis. 1 y = f(x)= x' +x² - 3x +5 3 9. x, <0 x,>0 A(x, , y;) x, + y = ? B(x,,y;)] O A) 10 OB) 11 OC) 12 OD) 9 O E) 8

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