x^2+64x-121=0

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Solution for x^2+64x-121=0 equation:


Simplifying
x2 + 64x + -121 = 0

Reorder the terms:
-121 + 64x + x2 = 0

Solving
-121 + 64x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '121' to each side of the equation.
-121 + 64x + 121 + x2 = 0 + 121

Reorder the terms:
-121 + 121 + 64x + x2 = 0 + 121

Combine like terms: -121 + 121 = 0
0 + 64x + x2 = 0 + 121
64x + x2 = 0 + 121

Combine like terms: 0 + 121 = 121
64x + x2 = 121

The x term is 64x.  Take half its coefficient (32).
Square it (1024) and add it to both sides.

Add '1024' to each side of the equation.
64x + 1024 + x2 = 121 + 1024

Reorder the terms:
1024 + 64x + x2 = 121 + 1024

Combine like terms: 121 + 1024 = 1145
1024 + 64x + x2 = 1145

Factor a perfect square on the left side:
(x + 32)(x + 32) = 1145

Calculate the square root of the right side: 33.837848631

Break this problem into two subproblems by setting 
(x + 32) equal to 33.837848631 and -33.837848631.

Subproblem 1

x + 32 = 33.837848631 Simplifying x + 32 = 33.837848631 Reorder the terms: 32 + x = 33.837848631 Solving 32 + x = 33.837848631 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-32' to each side of the equation. 32 + -32 + x = 33.837848631 + -32 Combine like terms: 32 + -32 = 0 0 + x = 33.837848631 + -32 x = 33.837848631 + -32 Combine like terms: 33.837848631 + -32 = 1.837848631 x = 1.837848631 Simplifying x = 1.837848631

Subproblem 2

x + 32 = -33.837848631 Simplifying x + 32 = -33.837848631 Reorder the terms: 32 + x = -33.837848631 Solving 32 + x = -33.837848631 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-32' to each side of the equation. 32 + -32 + x = -33.837848631 + -32 Combine like terms: 32 + -32 = 0 0 + x = -33.837848631 + -32 x = -33.837848631 + -32 Combine like terms: -33.837848631 + -32 = -65.837848631 x = -65.837848631 Simplifying x = -65.837848631

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.837848631, -65.837848631}

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