x^2-8x+16=5

Simple and best practice solution for x^2-8x+16=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^2-8x+16=5 equation:


Simplifying
x2 + -8x + 16 = 5

Reorder the terms:
16 + -8x + x2 = 5

Solving
16 + -8x + x2 = 5

Solving for variable 'x'.

Reorder the terms:
16 + -5 + -8x + x2 = 5 + -5

Combine like terms: 16 + -5 = 11
11 + -8x + x2 = 5 + -5

Combine like terms: 5 + -5 = 0
11 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-11' to each side of the equation.
11 + -8x + -11 + x2 = 0 + -11

Reorder the terms:
11 + -11 + -8x + x2 = 0 + -11

Combine like terms: 11 + -11 = 0
0 + -8x + x2 = 0 + -11
-8x + x2 = 0 + -11

Combine like terms: 0 + -11 = -11
-8x + x2 = -11

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -11 + 16

Reorder the terms:
16 + -8x + x2 = -11 + 16

Combine like terms: -11 + 16 = 5
16 + -8x + x2 = 5

Factor a perfect square on the left side:
(x + -4)(x + -4) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(x + -4) equal to 2.236067978 and -2.236067978.

Subproblem 1

x + -4 = 2.236067978 Simplifying x + -4 = 2.236067978 Reorder the terms: -4 + x = 2.236067978 Solving -4 + x = 2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 2.236067978 + 4 Combine like terms: -4 + 4 = 0 0 + x = 2.236067978 + 4 x = 2.236067978 + 4 Combine like terms: 2.236067978 + 4 = 6.236067978 x = 6.236067978 Simplifying x = 6.236067978

Subproblem 2

x + -4 = -2.236067978 Simplifying x + -4 = -2.236067978 Reorder the terms: -4 + x = -2.236067978 Solving -4 + x = -2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -2.236067978 + 4 Combine like terms: -4 + 4 = 0 0 + x = -2.236067978 + 4 x = -2.236067978 + 4 Combine like terms: -2.236067978 + 4 = 1.763932022 x = 1.763932022 Simplifying x = 1.763932022

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.236067978, 1.763932022}

See similar equations:

| 4x^2+20x+25=49 | | 6x^2+2x-30=4x^2+9x | | 4x^2-7x-5=0 | | 4x^2-9x-5=0 | | 4x^2-7x+13=0 | | 2x^2+6x=20 | | 5x^2-2x+16=4x^2+6x | | 2x^2-3=-6x-2 | | x^2+8x+10=3 | | x^2-3x+27=8x-3 | | 24x^2-20-16= | | x^2+4x-9=x+1 | | 4x(x^2-3x)=2x(4x-8)-9x | | h(x)=7(x^2)-1 | | h(x)=7x^2-1 | | 3y^2-6y+15=0 | | X^5+4x^4-8x^3-14x^2+7x+10=0 | | x^4-6x^2+x-1= | | X^2-4=0 | | =4n^3-2n^2+2n | | =3x^2-11x-4 | | y=x^2-6x-1 | | x^2+14x=-9 | | y=8x^2-11x+18 | | x^4+x^3+10x^2+16x-96=0 | | 13x^2-18x=0 | | y=4x^3 | | 2c^2-c-15= | | 5x^2=6x+10 | | y=x^3+9x^2-6x-56 | | x^2+3x-10=10 | | x^2+6x+8=3 |

Equations solver categories