x^2-8x+16=45

Simple and best practice solution for x^2-8x+16=45 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=45 equation:


Simplifying
x2 + -8x + 16 = 45

Reorder the terms:
16 + -8x + x2 = 45

Solving
16 + -8x + x2 = 45

Solving for variable 'x'.

Reorder the terms:
16 + -45 + -8x + x2 = 45 + -45

Combine like terms: 16 + -45 = -29
-29 + -8x + x2 = 45 + -45

Combine like terms: 45 + -45 = 0
-29 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '29' to each side of the equation.
-29 + -8x + 29 + x2 = 0 + 29

Reorder the terms:
-29 + 29 + -8x + x2 = 0 + 29

Combine like terms: -29 + 29 = 0
0 + -8x + x2 = 0 + 29
-8x + x2 = 0 + 29

Combine like terms: 0 + 29 = 29
-8x + x2 = 29

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 = 29 + 16

Reorder the terms:
16 + -8x + x2 = 29 + 16

Combine like terms: 29 + 16 = 45
16 + -8x + x2 = 45

Factor a perfect square on the left side:
(x + -4)(x + -4) = 45

Calculate the square root of the right side: 6.708203933

Break this problem into two subproblems by setting 
(x + -4) equal to 6.708203933 and -6.708203933.

Subproblem 1

x + -4 = 6.708203933 Simplifying x + -4 = 6.708203933 Reorder the terms: -4 + x = 6.708203933 Solving -4 + x = 6.708203933 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 = 6.708203933 + 4 Combine like terms: -4 + 4 = 0 0 + x = 6.708203933 + 4 x = 6.708203933 + 4 Combine like terms: 6.708203933 + 4 = 10.708203933 x = 10.708203933 Simplifying x = 10.708203933

Subproblem 2

x + -4 = -6.708203933 Simplifying x + -4 = -6.708203933 Reorder the terms: -4 + x = -6.708203933 Solving -4 + x = -6.708203933 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 = -6.708203933 + 4 Combine like terms: -4 + 4 = 0 0 + x = -6.708203933 + 4 x = -6.708203933 + 4 Combine like terms: -6.708203933 + 4 = -2.708203933 x = -2.708203933 Simplifying x = -2.708203933

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.708203933, -2.708203933}

See similar equations:

| -6(x-7)=-6(2x+2) | | (-6)-(-3)= | | x(x+1)=5 | | 35(0)=350-175x | | h(1)=3x-4 | | 35y=350-175(0) | | 74=4x+10 | | 4(6+8b)=-24+8b | | 9k-K=24 | | 35y=350-175x | | 62=6+7x | | (x-2)(x-2)(x)(x)=40 | | 12x^4-4x^2-2=0 | | -19-2v=-(5v+1)+6 | | 6p+5=47 | | 2x^3+21=5 | | 3n+4=8 | | -6x-7(-3x+6)=-132 | | -0+6y=9 | | -3=-4-v | | m-6+m=4m+2 | | h=16t^2+80t+96 | | 5-7(a^2)+3a^2-7= | | 0+5y=-5 | | 51=7n-5 | | X=1+0.15x^2 | | 5-r=r-3 | | -3x^2+5x-2=0 | | 3=2x+3-8x | | 8=0.4h+6.92+0.4h | | (2x+7)(x-3)=140 | | 18=-4n-5n |

Equations solver categories