Question

F(x) = x4 - x3 - 2x- 4 factor the polynomial function over the complex numbers

Answer 1

Answer:

f(x) = = (x + √2 i) (x - √2 i) (x - 2 ) (x + 1)

Step-by-step explanation:

The given function is f(x) = x⁴ - x³ -2x -4

factor the polynomial function

f(x) = x⁴ - x³ -2x -4 = (x⁴ - 4) - (x³ + 2x )  ⇒ take (-) as a common from (- x³ -2x)

     = (x² + 2 ) (x² - 2) - x (x² + 2)   ⇒ take (x² + 2)  as a common

     = (x² + 2 ) ( x² - x - 2)

     = (x + √2 i) (x - √2 i) (x -2 ) ( x+1)

Notes:  (x⁴ - 4) = (x² + 2 ) (x² - 2)

            (x² + 2)= (x + √2 i) (x - √2 i)

            ( x² - x - 2) = (x -2 ) ( x+1)

Answer 2

Answer:

(x+1)(x-2)(x+i$\sqrt{2}$) (x-i$\sqrt{2}$)

Step-by-step explanation:

I took the test on K12 and got it right.