Question

If x=-5+2undrroot -4,find the value of x4 + 9x3 + 35x2 - x + 4.

Answer 1

i think there is a problem u wrote 5+2underroot-4 bt negative cant be in underroot.........
if there is a mistake then tell me i will send u pic of solution

Answer 2

Answer:

-160

Step-by-step explanation:

Given : $x= -5+2\sqrt{-4}$

To Find :$x^4 + 9x^3 + 35x^2 - x + 4$

Solution :

$x= -5+2\sqrt{-4}=-5+2\sqrt{4i^2}$

$x= -5+2\sqrt{-4}=-5+4i$

$x^4 + 9x^3 + 35x^2 - x + 4$

$(-5+4i)^4 + 9(-5+4i)^3 + 35(-5+4i)^2 - (-5+4i) + 4$

$-160$