Give a polynomial function of least degree with integral coefficients having the given roots. 1) 1, -1, 1/2
2.) (-3-4i)
3) Is x-2 a factor of x/4 -10x/2+5x-14?

please help me ASAP

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project