4x^2+5=-21x

Simple and best practice solution for 4x^2+5=-21x 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 4x^2+5=-21x equation:


Simplifying
4x2 + 5 = -21x

Reorder the terms:
5 + 4x2 = -21x

Solving
5 + 4x2 = -21x

Solving for variable 'x'.

Reorder the terms:
5 + 21x + 4x2 = -21x + 21x

Combine like terms: -21x + 21x = 0
5 + 21x + 4x2 = 0

Factor a trinomial.
(5 + x)(1 + 4x) = 0

Subproblem 1

Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(1 + 4x)' equal to zero and attempt to solve: Simplifying 1 + 4x = 0 Solving 1 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 4x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 4x = 0 + -1 4x = 0 + -1 Combine like terms: 0 + -1 = -1 4x = -1 Divide each side by '4'. x = -0.25 Simplifying x = -0.25

Solution

x = {-5, -0.25}

See similar equations:

| x/2=70000 | | 2a-b=6 | | -6(-7b+8)-4b=-2-8b | | 4n-8n=8 | | 3a-2b=4 | | 4-4x=2x-9 | | a+2(-7.6)=1 | | 0.4a=12 | | -1[7+1(-7+1)]+14= | | 3x^3+24x^2-60x=0 | | 4X^2+4X-35=0 | | 5y-14=6 | | 9.6-7.2w=4.8w | | 16m=17 | | 5y-14= | | -6-3(7+x)=-33-4x | | 49=t+6t | | 0=-16t^2+17t+5 | | (3-x)*(4-x)*(5-x)=24 | | .3x=.01x+2.9 | | (13b-9)-6(2b+1)=-7 | | 2x-8=-x+5 | | -2x+8=x+5 | | 2x^2+12x+43=0 | | 7x-(6x+5)=1 | | n^2-15n+44=0 | | 3x^2+14=8 | | -13+2v=3(1+6v) | | 2x^2+12x+7=0 | | -2x-5=x-10 | | d-6=-5 | | 8x+6x+3+8=9x+5+4x |

Equations solver categories