The vectors A & B are in the xy plane where A is 3.2 m at 45 ° to the +x axis & B is 3 mat 280 ° to +x axis. Determine A. B

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answer: d.) the total number of protons and neutrons is 15

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answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

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mrb