
Patrick B. answered 01/13/20
Tutor
4.7
(31)
Math and computer tutor/teacher
1)
(x-4)(x+5i)(x-5i) =
(x-4)(x^2 + 25) =
x^3 - 4x^2 + 25x - 100
2)
(x-4) [ (x-7)+i] [ (x-7) - i ]
(x-4) [ (x-7)^2 + 1]
(x-4) ( x^2 - 14x +50)
x^3 - 4x^2 - 14x^2 + 56x + 50x - 200
x^3 - 18x^2 + 106x - 200