3x^2+36=-21x

Simple and best practice solution for 3x^2+36=-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 3x^2+36=-21x equation:


Simplifying
3x2 + 36 = -21x

Reorder the terms:
36 + 3x2 = -21x

Solving
36 + 3x2 = -21x

Solving for variable 'x'.

Reorder the terms:
36 + 21x + 3x2 = -21x + 21x

Combine like terms: -21x + 21x = 0
36 + 21x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(12 + 7x + x2) = 0

Factor a trinomial.
3((4 + x)(3 + x)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 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 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Solution

x = {-4, -3}

See similar equations:

| 7x+13=4x+97 | | 3/4≤2 | | 2x-5=13.3333333333 | | x+6=13.3333333333 | | r^2+10r+13=-8 | | 6x-10-x=10-3y | | 2x-5=13.33333 | | x+7=13.33333 | | x+6=13.33333 | | t/3-3=10 | | 12/35*14/9 | | 6a^2-17a+85=0 | | X/0.6=2 | | x^2+x+3=185 | | 2x-2-7=16 | | 8h-17=68 | | 2p-4= | | 2x-5=40 | | 7+a=-2 | | (3x^3)-(3x^2)= | | y=ac^2+bc+6 | | 3g+5d=50 | | Y=10x^3+7 | | 8x+4=36-2x | | 50+2.75b=400 | | x^3-x=1 | | 5(x+3)+3(x-2)=1 | | 48=k(14) | | 58=k(2) | | 35-12x^2-13x=0 | | 11/a | | 1-lnx/2=0 |

Equations solver categories