x^2+16x=-5

Simple and best practice solution for x^2+16x=-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 x^2+16x=-5 equation:


Simplifying
x2 + 16x = -5

Reorder the terms:
16x + x2 = -5

Solving
16x + x2 = -5

Solving for variable 'x'.

Reorder the terms:
5 + 16x + x2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 16x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + 16x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 16x + x2 = 0 + -5
16x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
16x + x2 = -5

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = -5 + 64

Reorder the terms:
64 + 16x + x2 = -5 + 64

Combine like terms: -5 + 64 = 59
64 + 16x + x2 = 59

Factor a perfect square on the left side:
(x + 8)(x + 8) = 59

Calculate the square root of the right side: 7.681145748

Break this problem into two subproblems by setting 
(x + 8) equal to 7.681145748 and -7.681145748.

Subproblem 1

x + 8 = 7.681145748 Simplifying x + 8 = 7.681145748 Reorder the terms: 8 + x = 7.681145748 Solving 8 + x = 7.681145748 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 7.681145748 + -8 Combine like terms: 8 + -8 = 0 0 + x = 7.681145748 + -8 x = 7.681145748 + -8 Combine like terms: 7.681145748 + -8 = -0.318854252 x = -0.318854252 Simplifying x = -0.318854252

Subproblem 2

x + 8 = -7.681145748 Simplifying x + 8 = -7.681145748 Reorder the terms: 8 + x = -7.681145748 Solving 8 + x = -7.681145748 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -7.681145748 + -8 Combine like terms: 8 + -8 = 0 0 + x = -7.681145748 + -8 x = -7.681145748 + -8 Combine like terms: -7.681145748 + -8 = -15.681145748 x = -15.681145748 Simplifying x = -15.681145748

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.318854252, -15.681145748}

See similar equations:

| 2x+3x=50 | | 7.25=2(3.14)r | | 0.00032= | | x+2x+x+13=181 | | x^5+x^4/x=0 | | x+2x+x+30=190 | | i=1.08(8/N) | | 5x^3+45x^2+5x+45=0 | | 0=8x^2+9x+9 | | v=8.2(4)(3) | | (5/(3x+1))-(27x/(3x-1))=-9 | | 0=8x^2+9+9 | | 0=8x^2+8x+9 | | x+2x+(x+26)=162 | | 4(a+3)=16 | | 0=-8x^2+2x+8 | | 3x+4/2x-3 | | 0=-8x^2+2x+9 | | 9=z-10 | | 9=a-10 | | x+2x+(x+26)=162ft | | 17(t-6)+4t=7(3t+3)-9 | | 0=-8x^2+9x+9 | | 2(x+7)=5x-14 | | f(x)=-x^2+8x+10 | | (-p+2r-15)+(7p+5)= | | 4y^2+4y+15= | | 32=2+w*w | | 32=2+w | | 25x+90+60=0 | | v=19*4*3 | | x+2x+4x=7x |

Equations solver categories