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:
-8x + 4x2 = 1

Solving
-8x + 4x2 = 1

Solving for variable 'x'.

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

Combine like terms: 1 + -1 = 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 = 2.118033989 x = 2.118033989 Simplifying x = 2.118033989

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 = -0.118033989 x = -0.118033989 Simplifying x = -0.118033989

Solution

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

See similar equations:

| h/4+5=7 | | 1+1=897n | | -10=2n+2 | | N+-6=2 | | x^2+7=-300 | | -2(6-x)-x=5x-1+x | | N=2-2n | | .29+.23n=1.90 | | 6(x+1)=12 | | 5x+3=12x-7x^2 | | 4(2-k)=-1(6k-5) | | 6(z-6)=7z-3 | | 4x+3=7x+9 | | V^2-6v+7=0 | | 8-m+6m=-4(2m-3) | | -v^2+6v-7=0 | | -14k=-126 | | B=-4(c-2d) | | w(w+5)=750 | | 3m+4n=-12 | | 5x^2-16x+15=4x-5 | | -2(9x+3)-7x=10x-(12x+9) | | 5x+6=3x+10 | | -5+5y=30 | | 3x-2+4=20 | | 3.4/4.4=x/22 | | -17+r=42 | | 8=4+m/7 | | 2a^2+11a-6=0 | | 5x^2=24x+5 | | -3+k/6=-13 | | 6x^2-14x+10=2 |

Equations solver categories