The trajectory of a particle moving in xy-plane is y=x3-3x2-4x+12. The particle crosses the x-axis :a)Onceb) Twicec) Three timesd) Four times

Dear abhingya

y=x³-3x²-4x+12

f(x)= x³-3x²-4x+12

f(-2) =0

f(2) =0

f(3) =0

clearly it cut the x axis at three points

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