(x^4)+(4x^2)-21=0

Simple and best practice solution for (x^4)+(4x^2)-21=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for (x^4)+(4x^2)-21=0 equation:


Simplifying
(x4) + (4x2) + -21 = 0
x4 + (4x2) + -21 = 0

Reorder the terms:
-21 + (4x2) + x4 = 0

Solving
-21 + (4x2) + x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -1x2)(3 + -1x2) = 0

Subproblem 1

Set the factor '(-7 + -1x2)' equal to zero and attempt to solve: Simplifying -7 + -1x2 = 0 Solving -7 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x2 = 0 + 7 -1x2 = 0 + 7 Combine like terms: 0 + 7 = 7 -1x2 = 7 Divide each side by '-1'. x2 = -7 Simplifying x2 = -7 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(3 + -1x2)' equal to zero and attempt to solve: Simplifying 3 + -1x2 = 0 Solving 3 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x2 = 0 + -3 -1x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -1x2 = -3 Divide each side by '-1'. x2 = 3 Simplifying x2 = 3 Take the square root of each side: x = {-1.732050808, 1.732050808}

Solution

x = {-1.732050808, 1.732050808}

See similar equations:

| 3X-16=60 | | x^3-9x^2+x= | | 19y-60=4(y-15) | | 3x^2+6x-210= | | 19y-60= | | 55x=8x | | 264=-v+55 | | 12y-3=36-y | | 7x+6+x=4+5x-7 | | 12=-v+216 | | b=.5m(q+z) | | (3X-16)+(4X-8)=60 | | 168-v=3 | | (a^8b-4)(a^8b-9)= | | 191=17-y | | 3s^2-9s= | | 2(5z-1)-2(z+9)=5(z+1) | | 3(2x+1)=7 | | -19x+3y=-23 | | (4w-9+w)(68-2+13)=0 | | 4x+5+x=3+2x+8 | | 76=f+12 | | y=x^2+13+18 | | 9b^2-25g^2= | | p=8*3-12 | | 4(5y-3)= | | 16w^2+40wt+25t^2= | | 81v^2-18v+1= | | 30x+5y=-25 | | p=8*-12 | | a^4-64= | | 4v^2=19v+5 |

Equations solver categories