x^2+16x=-16

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


Simplifying
x2 + 16x = -16

Reorder the terms:
16x + x2 = -16

Solving
16x + x2 = -16

Solving for variable 'x'.

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

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

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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 = -16 + 64

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

Combine like terms: -16 + 64 = 48
64 + 16x + x2 = 48

Factor a perfect square on the left side:
(x + 8)(x + 8) = 48

Calculate the square root of the right side: 6.92820323

Break this problem into two subproblems by setting 
(x + 8) equal to 6.92820323 and -6.92820323.

Subproblem 1

x + 8 = 6.92820323 Simplifying x + 8 = 6.92820323 Reorder the terms: 8 + x = 6.92820323 Solving 8 + x = 6.92820323 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 = 6.92820323 + -8 Combine like terms: 8 + -8 = 0 0 + x = 6.92820323 + -8 x = 6.92820323 + -8 Combine like terms: 6.92820323 + -8 = -1.07179677 x = -1.07179677 Simplifying x = -1.07179677

Subproblem 2

x + 8 = -6.92820323 Simplifying x + 8 = -6.92820323 Reorder the terms: 8 + x = -6.92820323 Solving 8 + x = -6.92820323 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 = -6.92820323 + -8 Combine like terms: 8 + -8 = 0 0 + x = -6.92820323 + -8 x = -6.92820323 + -8 Combine like terms: -6.92820323 + -8 = -14.92820323 x = -14.92820323 Simplifying x = -14.92820323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.07179677, -14.92820323}

See similar equations:

| 5-10x=135-45x | | 2x^2+24+72=0 | | (n-6)*5=40 | | 4x^2-31x+21= | | 3-x=12 | | x-8x+16=1 | | d^2+56+18d=0 | | 2x-4+6x-3=4x+4x+7 | | 85-4x=2x+19 | | 4-7x=52 | | y^2+3y+2=0 | | 16x+6=36 | | 4(2x-5)+2=x+17 | | 6y(4y+9)=0 | | x/0.6=8.9 | | 12-4x(1-x)=x^2-2x-7 | | 5+3(y-4)=5(y+2)-y | | (v)/(-6)+2=-1 | | 3(x+2)=23 | | x+[x(.20)]=14.99 | | 2s+9p=tp-9 | | 11-10x=141-45x | | v-6+2=11 | | x/0.4=10 | | 1x+19=23 | | 5.1x+19=23 | | 3x^2(3x^3+5x-4)-5x^3(x^2-6)= | | x+3=-2x-9 | | 3y-yz=2z | | 14x+8=12x+20 | | 2x+12+8x-2=90 | | a(y+c)=b(y-c) |

Equations solver categories