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

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

Solving
4x2 = -1 + -8x

Solving for variable 'x'.

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

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

Combine like terms: -1 + 1 = 0
1 + 8x + 4x2 = 0 + -8x + 8x
1 + 8x + 4x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
1 + 8x + 4x2 = 0

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:

| (x-3)/(x)=(8)/(x+3) | | .17x-4=-6 | | 1/4x+12=20 | | 6x-12y=96fory | | 3x*2-5=49 | | x/-3=29 | | 36x^2-84x+9=0 | | 1/3(x-4)*2=11 | | 6x-12y=96 | | (4x+6)=106 | | (2x+11)=53 | | -200.00+0.50x=75.00+10x | | 8m^3*9m^4/3m^5 | | 9/14-1/4 | | -(1/3)^2 | | 200.00+0.50x=75.00+10x | | 0=3x^2+6x+6 | | 200.00+0.05x=400.00 | | 75.00+0.10x=400.00 | | 15m=165 | | 3/4+5/3a=7/12 | | 3/4+i | | (4a-7)*2= | | 217-7=38+22 | | -8x+240=-3(x+4)(x-15) | | (3/4)x^2+6x+6 | | 3n+1=n+2 | | t-(-4t+7)=2(2t-9)+2t | | X^2-3x=-10 | | 3w-2=31 | | 2-7z-2=-(3z+4) | | -5x-x^5-10+20x^5=y |

Equations solver categories