3x^2+12x=15

Simple and best practice solution for 3x^2+12x=15 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+12x=15 equation:


Simplifying
3x2 + 12x = 15

Reorder the terms:
12x + 3x2 = 15

Solving
12x + 3x2 = 15

Solving for variable 'x'.

Reorder the terms:
-15 + 12x + 3x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 12x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + 4x + x2) = 0

Factor a trinomial.
3((-5 + -1x)(1 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 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 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 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 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1

Solution

x = {-5, 1}

See similar equations:

| 12=2+(n-1)4 | | t-41/2=41/2 | | b=-1cx-1+-1x | | 42+17w-15w^2=0 | | -3(9d+2)= | | y+2/3=5 | | 12=2+(n+1)4 | | n/6-n/18=4n/3 | | -6-7=-13 | | 4+6x^2-13x=0 | | 15/5x7/9 | | 20y^2+41y-9=0 | | 3+(-11)= | | 16a^2+48a+27=0 | | 4a^2+4a-63=0 | | 20y^2+41-9=0 | | 33/5/12/7 | | -12=5x+2 | | -2(2n+3)=2n-6 | | ((((x-9)3)-9)+(((x-9)3)-9))=0 | | 9=15x-6 | | 7y/8y=1/3 | | 535+4.50n=12m | | 5y+9y+2y-3= | | 2x/5x-1x/3x=4 | | M/7 | | 8n-2=25 | | 12=m+n | | ((3x-27)-9)=0 | | 3x-1x=2 | | (9x-6)(x+16)=0 | | 7/10+5/22 |

Equations solver categories