8x^2+8=6-9x

Simple and best practice solution for 8x^2+8=6-9x 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 8x^2+8=6-9x equation:


Simplifying
8x2 + 8 = 6 + -9x

Reorder the terms:
8 + 8x2 = 6 + -9x

Solving
8 + 8x2 = 6 + -9x

Solving for variable 'x'.

Reorder the terms:
8 + -6 + 9x + 8x2 = 6 + -9x + -6 + 9x

Combine like terms: 8 + -6 = 2
2 + 9x + 8x2 = 6 + -9x + -6 + 9x

Reorder the terms:
2 + 9x + 8x2 = 6 + -6 + -9x + 9x

Combine like terms: 6 + -6 = 0
2 + 9x + 8x2 = 0 + -9x + 9x
2 + 9x + 8x2 = -9x + 9x

Combine like terms: -9x + 9x = 0
2 + 9x + 8x2 = 0

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
0.25 + 1.125x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 1.125x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 1.125x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 1.125x + x2 = 0 + -0.25
1.125x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
1.125x + x2 = -0.25

The x term is 1.125x.  Take half its coefficient (0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
1.125x + 0.31640625 + x2 = -0.25 + 0.31640625

Reorder the terms:
0.31640625 + 1.125x + x2 = -0.25 + 0.31640625

Combine like terms: -0.25 + 0.31640625 = 0.06640625
0.31640625 + 1.125x + x2 = 0.06640625

Factor a perfect square on the left side:
(x + 0.5625)(x + 0.5625) = 0.06640625

Calculate the square root of the right side: 0.257694102

Break this problem into two subproblems by setting 
(x + 0.5625) equal to 0.257694102 and -0.257694102.

Subproblem 1

x + 0.5625 = 0.257694102 Simplifying x + 0.5625 = 0.257694102 Reorder the terms: 0.5625 + x = 0.257694102 Solving 0.5625 + x = 0.257694102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5625' to each side of the equation. 0.5625 + -0.5625 + x = 0.257694102 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + x = 0.257694102 + -0.5625 x = 0.257694102 + -0.5625 Combine like terms: 0.257694102 + -0.5625 = -0.304805898 x = -0.304805898 Simplifying x = -0.304805898

Subproblem 2

x + 0.5625 = -0.257694102 Simplifying x + 0.5625 = -0.257694102 Reorder the terms: 0.5625 + x = -0.257694102 Solving 0.5625 + x = -0.257694102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5625' to each side of the equation. 0.5625 + -0.5625 + x = -0.257694102 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + x = -0.257694102 + -0.5625 x = -0.257694102 + -0.5625 Combine like terms: -0.257694102 + -0.5625 = -0.820194102 x = -0.820194102 Simplifying x = -0.820194102

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.304805898, -0.820194102}

See similar equations:

| 19/r=152/4 | | x+14=-86 | | 3(n-9)=-21 | | 4x^3+21x^2+28x=-28 | | 45=-4x+1 | | 3q+5=-2q-20 | | 19r=152/4 | | 3q+5=2q-20 | | 4x^2+16=2x^2 | | 7/8=x/28 | | y=lne^2 | | 24+3x=-12 | | 5X-(x+2)=14 | | 7y-5y+3-y=2y-5-3y | | logx+8+logx-1=1 | | 163n=9.78 | | 3x-57=23-2x | | 12x-21y=-42 | | 4x+11=2x+391 | | 5(6n-6)=30 | | (x-1)(x^2+6x+9)=0 | | 9/30=p/16 | | 4x+12y=-24 | | 5x+7x-12x+-2x= | | 11x=3(x+8) | | -2(-4x+3)+3x+1=61 | | 10000+50x+x^2=0 | | .6(r-4)=2(r-8)+3r | | -1.75=-4.9x^2+12x | | 2a+2=-5 | | (13x-2)+(7x+19)+(11y-6)=180 | | Y/18=21/63 |

Equations solver categories