2x^2+12x=-8

Simple and best practice solution for 2x^2+12x=-8 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 2x^2+12x=-8 equation:


Simplifying
2x2 + 12x = -8

Reorder the terms:
12x + 2x2 = -8

Solving
12x + 2x2 = -8

Solving for variable 'x'.

Reorder the terms:
8 + 12x + 2x2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + 12x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(4 + 6x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(4 + 6x + x2)' equal to zero and attempt to solve: Simplifying 4 + 6x + x2 = 0 Solving 4 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-4' to each side of the equation. 4 + 6x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + 6x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 6x + x2 = 0 + -4 6x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 6x + x2 = -4 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = -4 + 9 Reorder the terms: 9 + 6x + x2 = -4 + 9 Combine like terms: -4 + 9 = 5 9 + 6x + x2 = 5 Factor a perfect square on the left side: (x + 3)(x + 3) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (x + 3) equal to 2.236067978 and -2.236067978.

Subproblem 1

x + 3 = 2.236067978 Simplifying x + 3 = 2.236067978 Reorder the terms: 3 + x = 2.236067978 Solving 3 + x = 2.236067978 Solving for variable 'x'. 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 = 2.236067978 + -3 Combine like terms: 3 + -3 = 0 0 + x = 2.236067978 + -3 x = 2.236067978 + -3 Combine like terms: 2.236067978 + -3 = -0.763932022 x = -0.763932022 Simplifying x = -0.763932022

Subproblem 2

x + 3 = -2.236067978 Simplifying x + 3 = -2.236067978 Reorder the terms: 3 + x = -2.236067978 Solving 3 + x = -2.236067978 Solving for variable 'x'. 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 = -2.236067978 + -3 Combine like terms: 3 + -3 = 0 0 + x = -2.236067978 + -3 x = -2.236067978 + -3 Combine like terms: -2.236067978 + -3 = -5.236067978 x = -5.236067978 Simplifying x = -5.236067978

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.763932022, -5.236067978}

Solution

x = {-0.763932022, -5.236067978}

See similar equations:

| -7x+16=-9x-2 | | -1/9(x-1/9)-1/5(x-1/9) | | 3+5n=4[n+2]+6n | | 22x+3(x+1)=25(x+1)-22 | | 1/5(25−5a)=4−a | | 10x=4/6 | | .75p=100+.4p | | 10x+13=2x+197 | | 2y-11=-17 | | -13x-115=-102 | | 2x+7+9x+7=7x+4x+11 | | 63+x=223 | | 5[c-2]=2[c+1] | | 12/60y=6/30y | | 5n+5=46 | | -11y-5=-65 | | 123=3(1-5x) | | G=-3a+1 | | -94=2(1+6p) | | 3x-(-2/3)/5=2 | | 11x-(3x+49)=7 | | 0=-15+9x-15y | | 9x-7x=2(-5x-1)+12(x-5) | | -155=-5(-1+8n) | | 3n^2+1=289 | | y=2(x+5)(x-1) | | 3x+7y+5z=6 | | 2cos^2(67.5)-1=0 | | 56x-13=x-6 | | 7(4x+11)-9=6(4x+4) | | 10p^2-4p+2=0 | | 4/3(3.14)(343) |

Equations solver categories