What are the solutions of the equation x4+3x2+2=0? use u substitution to solve

x = ± i , x = ±√2i are solution .

Step-by-step explanation:

Given : , use u substitution to solve.

To find : what are the solutions of the equation .

Solution : We have given that .

Let consider = u .

Substitute u =   in given equation .

.

On factoring

.

Taking common

u( u+2) +1 (u+2) = 0.

On grouping

(u+1) (u+2) =0

Now, u+1 = 0 ⇒ u = -1.

         u+2 = 0 ⇒ u = -2.

In term of x, plugging = u.

= -1   ;   = -2.

taking square root both side

x = ± i

x = ±√2i.

Therefore, x = ± i , x = ±√2i are solution .

answer: sine

step-by-step explanation:

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.