4x^2-1+8x=0

Simple and best practice solution for 4x^2-1+8x=0 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^2-1+8x=0 equation:


Simplifying
4x2 + -1 + 8x = 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 = 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:

| ((4m)-(1m/28a)) | | c=2*3.14*32 | | 9x^2+8=12 | | -7(x+2)-13=19+3 | | -x+3=2x+12 | | 7*(r+1)-2r=3*(r+5) | | 9z+4=58 | | x^2+5x-10=x^2+4 | | 16=3w-14 | | 13y=21 | | 7x-84=2x-16 | | 5x-11=7x-9 | | 3y+2x=20 | | 4a-3b=-26 | | 4x-4y=Cos(x+y) | | 5y+3x=18 | | ((1/2)(-3m/4)+7)=((4m)-9(-m/28)) | | 2y+y-1/2=51/2 | | 27.36/3.2 | | 6=-2x-8 | | 12.40/40 | | -(6x-7x+7)= | | X+4x+7=2 | | x^2+8+12=0 | | 3g^3h^3/6g | | 4x-2x=14 | | 0=16t^2+90t+7 | | n+(n+3)=17 | | -(7x-7x+7)= | | -2x-2x-2x-2x-2= | | 4.30/5 | | 6x-8x+8=-4x+6 |

Equations solver categories