If a polynomial function f(x) has roots 4 – 13i and 5, what must be a factor of f(x)?
(x + (13 – 4i))
(x – (13 + 4i))
(x + (4 + 13i))
(x – (4 + 13i))

If a poly has a root, r1 then a factor is (x-r1)

roots of (4-13i) and 5
factors are
(x-(4-13i)) and (x-5)

none of the above
look at them
unless you misyped

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )