2x^2-8x=3

Simple and best practice solution for 2x^2-8x=3 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 2x^2-8x=3 equation:


Simplifying
2x2 + -8x = 3

Reorder the terms:
-8x + 2x2 = 3

Solving
-8x + 2x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + -8x + 2x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + -8x + 2x2 = 0

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

Divide each side by '2'.
-1.5 + -4x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -4x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -4x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -4x + x2 = 0 + 1.5
-4x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-4x + x2 = 1.5

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 1.5 + 4

Reorder the terms:
4 + -4x + x2 = 1.5 + 4

Combine like terms: 1.5 + 4 = 5.5
4 + -4x + x2 = 5.5

Factor a perfect square on the left side:
(x + -2)(x + -2) = 5.5

Calculate the square root of the right side: 2.34520788

Break this problem into two subproblems by setting 
(x + -2) equal to 2.34520788 and -2.34520788.

Subproblem 1

x + -2 = 2.34520788 Simplifying x + -2 = 2.34520788 Reorder the terms: -2 + x = 2.34520788 Solving -2 + x = 2.34520788 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 2.34520788 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.34520788 + 2 x = 2.34520788 + 2 Combine like terms: 2.34520788 + 2 = 4.34520788 x = 4.34520788 Simplifying x = 4.34520788

Subproblem 2

x + -2 = -2.34520788 Simplifying x + -2 = -2.34520788 Reorder the terms: -2 + x = -2.34520788 Solving -2 + x = -2.34520788 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -2.34520788 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.34520788 + 2 x = -2.34520788 + 2 Combine like terms: -2.34520788 + 2 = -0.34520788 x = -0.34520788 Simplifying x = -0.34520788

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.34520788, -0.34520788}

See similar equations:

| 2x-(x-1)=12+5(x-1) | | 37-19=3(x-6) | | 3(7-2x)=8-x | | 6(x-1)=9x-8 | | (x-4)(x^2-7x+16)= | | 8x-3=7x-18 | | (2x+7)+(3x-11)= | | (x+15)(2x+1)= | | 8x-22=180 | | 4x-8=18-x | | (2x^2+3x-6)-(-4x+5)= | | 8x-22=8x-22 | | 8x+2=2x-10 | | 7+6x=3x+26 | | 6x-1=2x+18 | | 3x+42+12x+6x=180 | | solvey^5-y^4=0 | | -3(x+8)-42=5-53 | | 2(8x-6)-5(7x-8)=3(7x-5)-9(4x-3) | | 3x+42+12x=180 | | 2w=15 | | logx+log(3x+5)=2 | | (-4x^3)(9x^2)= | | 7a+2=16 | | x=1+i | | 9x-7=74 | | 43+2x=180 | | 4x=2(7x+25) | | (2x^2-2x+2)+(-9x^2+7x-7)= | | -15+n=-o | | jy+b=ey+d | | 30=3t-13t |

Equations solver categories