-8x=4x^2-1

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


Simplifying
-8x = 4x2 + -1

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

Solving
-8x = -1 + 4x2

Solving for variable 'x'.

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

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

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

Combine like terms: 4x2 + -4x2 = 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 = 1.25
1 + 2x + x2 = 1.25

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + 1) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + 1 = 1.118033989 Simplifying x + 1 = 1.118033989 Reorder the terms: 1 + x = 1.118033989 Solving 1 + x = 1.118033989 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 = 1.118033989 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.118033989 + -1 x = 1.118033989 + -1 Combine like terms: 1.118033989 + -1 = 0.118033989 x = 0.118033989 Simplifying x = 0.118033989

Subproblem 2

x + 1 = -1.118033989 Simplifying x + 1 = -1.118033989 Reorder the terms: 1 + x = -1.118033989 Solving 1 + x = -1.118033989 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 = -1.118033989 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.118033989 + -1 x = -1.118033989 + -1 Combine like terms: -1.118033989 + -1 = -2.118033989 x = -2.118033989 Simplifying x = -2.118033989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.118033989, -2.118033989}

See similar equations:

| 5.125/1.02 | | 55=x/2465.74 | | 54=4y/8+6 | | e^2x=(1/8) | | e^2x=(1/8)4 | | 35-26z=26z+35 | | 8-n/10=88 | | 5k-10=4 | | 16.32=3g+3.69 | | 3w^3=528 | | 6+p/3=9 | | 5w^3=528 | | x^5-27x^2=0 | | 1.62g-12=0.15 | | 55=x/(900000/365) | | 1.14-7=0.14 | | 4u-3u-1=0 | | x+45=5 | | 3x+45=5 | | 4X-3X-1=0 | | 9j-8=8-9j | | 4x+2(3-x)=10 | | 14=5n-3(n-4) | | 37z+69=37z+43 | | b/13-6b/13=40/13 | | -5.3=.2v-8.6 | | 5y-5=4+2y | | 8y+28=28-8y | | 4t-25=-15+6t | | 120=x+25 | | -3(r+8)=-43 | | 6y-4=-15+15y |

Equations solver categories