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 = 1.5
4 + 4x + x2 = 1.5

Factor a perfect square on the left side:
(x + 2)(x + 2) = 1.5

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(x + 2) equal to 1.224744871 and -1.224744871.

Subproblem 1

x + 2 = 1.224744871 Simplifying x + 2 = 1.224744871 Reorder the terms: 2 + x = 1.224744871 Solving 2 + x = 1.224744871 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 = 1.224744871 + -2 Combine like terms: 2 + -2 = 0 0 + x = 1.224744871 + -2 x = 1.224744871 + -2 Combine like terms: 1.224744871 + -2 = -0.775255129 x = -0.775255129 Simplifying x = -0.775255129

Subproblem 2

x + 2 = -1.224744871 Simplifying x + 2 = -1.224744871 Reorder the terms: 2 + x = -1.224744871 Solving 2 + x = -1.224744871 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 = -1.224744871 + -2 Combine like terms: 2 + -2 = 0 0 + x = -1.224744871 + -2 x = -1.224744871 + -2 Combine like terms: -1.224744871 + -2 = -3.224744871 x = -3.224744871 Simplifying x = -3.224744871

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.775255129, -3.224744871}

See similar equations:

| 45a=-9 | | 3x-12+2x+22=180 | | -2/7y=1/6 | | 167.04--888.05= | | 2(3a+5)=4(a-2) | | s-4=7.3 | | 3b=-33 | | -846.05--983.08= | | (-846.05)-(-983.08)= | | -8v-43=-7-8(v+4) | | x-(7-x)=2 | | 4x-12+2x-36=90 | | (-846.5)-(-983.8)= | | 2(n-1)=2(2n+4) | | 2x+2y-3xy=1 | | -4b-6+b=-2b+b-10 | | 43-4(c+3)=4-1(c+9) | | 4h+3.5=3h+6 | | F(x)=2x+15 | | 3(2w-1)=9(w+2) | | 10-2b=-3(1+6b)-3 | | 4(g+2)=29+g | | 20+10x=10x | | 14a=-28 | | -1-.7x=x-(-1.8x+2) | | X-3/2=X/5 | | 6=-2q | | 15+3x=7(x+1) | | 11+7p=4-(9p+10) | | 3x+6=243 | | 11-5(p+1)=6-3(3p-4) | | -1/8x=2 |

Equations solver categories