x^2-16x=55

Simple and best practice solution for x^2-16x=55 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=55 equation:


Simplifying
x2 + -16x = 55

Reorder the terms:
-16x + x2 = 55

Solving
-16x + x2 = 55

Solving for variable 'x'.

Reorder the terms:
-55 + -16x + x2 = 55 + -55

Combine like terms: 55 + -55 = 0
-55 + -16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + -16x + 55 + x2 = 0 + 55

Reorder the terms:
-55 + 55 + -16x + x2 = 0 + 55

Combine like terms: -55 + 55 = 0
0 + -16x + x2 = 0 + 55
-16x + x2 = 0 + 55

Combine like terms: 0 + 55 = 55
-16x + x2 = 55

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 = 55 + 64

Reorder the terms:
64 + -16x + x2 = 55 + 64

Combine like terms: 55 + 64 = 119
64 + -16x + x2 = 119

Factor a perfect square on the left side:
(x + -8)(x + -8) = 119

Calculate the square root of the right side: 10.908712115

Break this problem into two subproblems by setting 
(x + -8) equal to 10.908712115 and -10.908712115.

Subproblem 1

x + -8 = 10.908712115 Simplifying x + -8 = 10.908712115 Reorder the terms: -8 + x = 10.908712115 Solving -8 + x = 10.908712115 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 = 10.908712115 + 8 Combine like terms: -8 + 8 = 0 0 + x = 10.908712115 + 8 x = 10.908712115 + 8 Combine like terms: 10.908712115 + 8 = 18.908712115 x = 18.908712115 Simplifying x = 18.908712115

Subproblem 2

x + -8 = -10.908712115 Simplifying x + -8 = -10.908712115 Reorder the terms: -8 + x = -10.908712115 Solving -8 + x = -10.908712115 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 = -10.908712115 + 8 Combine like terms: -8 + 8 = 0 0 + x = -10.908712115 + 8 x = -10.908712115 + 8 Combine like terms: -10.908712115 + 8 = -2.908712115 x = -2.908712115 Simplifying x = -2.908712115

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.908712115, -2.908712115}

See similar equations:

| 2.5+2c=12 | | 2x-(-8)=8 | | 13a-4=17 | | 2x-(0)=8 | | 19-6x=11-7x | | 50=(5x+14) | | 0.5x=1.6+0.25x+0.25 | | 18,732-730,548= | | 18,732-730,548=0 | | 2x^2+15x-25=0 | | 2x+9=-11-3x | | (4x-10)+(2x+20)=1803 | | 2b*a= | | 18=-8+6(k+9) | | 25-24=15 | | 18,732+-730,548=0 | | 6x+3=7x-12 | | (5x-10)+(8x-5)=180 | | -4y+12=6y | | 3+10x=-42+x | | 28q+10=150 | | x-8=-11+x | | 4=-3+34 | | 18x+10=9(2x+10) | | 2b*2a= | | 959x=74874x | | 3(2x+1)=-2x-3 | | 2(x-1)+4=x | | (x)=x^2-14x+40 | | -7c+8c=-28 | | Y=7(0)-5 | | 26r+85=-487 |

Equations solver categories