2x^2=8x+5

Simple and best practice solution for 2x^2=8x+5 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+5 equation:


Simplifying
2x2 = 8x + 5

Reorder the terms:
2x2 = 5 + 8x

Solving
2x2 = 5 + 8x

Solving for variable 'x'.

Reorder the terms:
-5 + -8x + 2x2 = 5 + 8x + -5 + -8x

Reorder the terms:
-5 + -8x + 2x2 = 5 + -5 + 8x + -8x

Combine like terms: 5 + -5 = 0
-5 + -8x + 2x2 = 0 + 8x + -8x
-5 + -8x + 2x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-5 + -8x + 2x2 = 0

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

Divide each side by '2'.
-2.5 + -4x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -4x + 2.5 + x2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -4x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -4x + x2 = 0 + 2.5
-4x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-4x + x2 = 2.5

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 = 2.5 + 4

Reorder the terms:
4 + -4x + x2 = 2.5 + 4

Combine like terms: 2.5 + 4 = 6.5
4 + -4x + x2 = 6.5

Factor a perfect square on the left side:
(x + -2)(x + -2) = 6.5

Calculate the square root of the right side: 2.549509757

Break this problem into two subproblems by setting 
(x + -2) equal to 2.549509757 and -2.549509757.

Subproblem 1

x + -2 = 2.549509757 Simplifying x + -2 = 2.549509757 Reorder the terms: -2 + x = 2.549509757 Solving -2 + x = 2.549509757 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 = 2.549509757 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.549509757 + 2 x = 2.549509757 + 2 Combine like terms: 2.549509757 + 2 = 4.549509757 x = 4.549509757 Simplifying x = 4.549509757

Subproblem 2

x + -2 = -2.549509757 Simplifying x + -2 = -2.549509757 Reorder the terms: -2 + x = -2.549509757 Solving -2 + x = -2.549509757 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 = -2.549509757 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.549509757 + 2 x = -2.549509757 + 2 Combine like terms: -2.549509757 + 2 = -0.549509757 x = -0.549509757 Simplifying x = -0.549509757

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.549509757, -0.549509757}

See similar equations:

| (50-2x)(30-2x)(x)=3000 | | .50(6x+18)=3(x+3) | | -15-5x=5x+14 | | 2x-13+2x+9+2x+11+3x-1+2x-7+2x-3+3x-8=900 | | 2x-13+2x+9+2x+11+3x-1+2x-7+2x-3+3x-8= | | q^2-q-42=0 | | 2x^5+12x^4+16x^3-12x^2-18=0 | | r^2-r-30=0 | | 5(3G-2)=3(5x-1) | | 11-7x=38-35 | | x+8x=305 | | (8-x)*x=5 | | 4x+33=13x-4 | | 2x^3-14x^2+33x+2=0 | | y=-x^2+6x-4 | | 7p-3=0.75(8p-12) | | 2(x+3)-7=6-5(x+1) | | 0.20(15n+5)=8n-9 | | X^2-6=75 | | 5+2x=20+4x | | 2x^3+6x^2+11x-14=0 | | 4+2/5+3+5/10= | | t^2-t-42=0 | | X=1y+2 | | 0.6(x-0.4)=3.6 | | 12*(x-4)=72 | | t^2-14t+24=0 | | -m-30=-6 | | 5(x-3)+6=1 | | 5x-i(x-5)=13 | | r^2+15r+56=0 | | 3x^2+2x=7 |

Equations solver categories