4x^2+8x+1=

Simple and best practice solution for 4x^2+8x+1= 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+8x+1= equation:


Simplifying
4x2 + 8x + 1 = 0

Reorder the terms:
1 + 8x + 4x2 = 0

Solving
1 + 8x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
0.25 + 2x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 2x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 2x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 2x + x2 = 0 + -0.25
2x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
2x + x2 = -0.25

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -0.25 + 1

Reorder the terms:
1 + 2x + x2 = -0.25 + 1

Combine like terms: -0.25 + 1 = 0.75
1 + 2x + x2 = 0.75

Factor a perfect square on the left side:
(x + 1)(x + 1) = 0.75

Calculate the square root of the right side: 0.866025404

Break this problem into two subproblems by setting 
(x + 1) equal to 0.866025404 and -0.866025404.

Subproblem 1

x + 1 = 0.866025404 Simplifying x + 1 = 0.866025404 Reorder the terms: 1 + x = 0.866025404 Solving 1 + x = 0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0.866025404 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0.866025404 + -1 x = 0.866025404 + -1 Combine like terms: 0.866025404 + -1 = -0.133974596 x = -0.133974596 Simplifying x = -0.133974596

Subproblem 2

x + 1 = -0.866025404 Simplifying x + 1 = -0.866025404 Reorder the terms: 1 + x = -0.866025404 Solving 1 + x = -0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -0.866025404 + -1 Combine like terms: 1 + -1 = 0 0 + x = -0.866025404 + -1 x = -0.866025404 + -1 Combine like terms: -0.866025404 + -1 = -1.866025404 x = -1.866025404 Simplifying x = -1.866025404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.133974596, -1.866025404}

See similar equations:

| 4/5x7/9 | | h+6.4=7.4 | | 1-7n+1=-19 | | x^2+1*-x^2+1=32 | | Y=5x^2-6x-4 | | 1-3n=16 | | 10-3x+10-7=5x-5+2x+8 | | 6(x-5)-3=8(x+5) | | lne=5x | | 8y+30=4y+44 | | 4.7g+4=2.7g+8 | | 3x-y=71 | | 11-3a=-2a+5 | | 8x-9=2+11x | | (2x-5)(-x+1)= | | 4u^2-49w^2= | | (x^2+y^2)(x-2y+13)-2xy= | | 832-23= | | 2b+7-7b+7= | | y=.5*-9 | | x^2+5x+100=x+8 | | 0.7t-4t-3= | | H=-5t^2+40t+45 | | 2m(7m^3+5m^2-m)= | | 19a=-9a-7(-4a+6) | | 42=8h+13h | | -4(x-6)=2(7-3x) | | 2(17a+19)=19h-19+12h | | 6y*-3t^2=0 | | -20-19a-19=7(-15a+19) | | 10x+51=1 | | 178/500 |

Equations solver categories