x^2+14x=282

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Solution for x^2+14x=282 equation:


Simplifying
x2 + 14x = 282

Reorder the terms:
14x + x2 = 282

Solving
14x + x2 = 282

Solving for variable 'x'.

Reorder the terms:
-282 + 14x + x2 = 282 + -282

Combine like terms: 282 + -282 = 0
-282 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '282' to each side of the equation.
-282 + 14x + 282 + x2 = 0 + 282

Reorder the terms:
-282 + 282 + 14x + x2 = 0 + 282

Combine like terms: -282 + 282 = 0
0 + 14x + x2 = 0 + 282
14x + x2 = 0 + 282

Combine like terms: 0 + 282 = 282
14x + x2 = 282

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = 282 + 49

Reorder the terms:
49 + 14x + x2 = 282 + 49

Combine like terms: 282 + 49 = 331
49 + 14x + x2 = 331

Factor a perfect square on the left side:
(x + 7)(x + 7) = 331

Calculate the square root of the right side: 18.193405399

Break this problem into two subproblems by setting 
(x + 7) equal to 18.193405399 and -18.193405399.

Subproblem 1

x + 7 = 18.193405399 Simplifying x + 7 = 18.193405399 Reorder the terms: 7 + x = 18.193405399 Solving 7 + x = 18.193405399 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 18.193405399 + -7 Combine like terms: 7 + -7 = 0 0 + x = 18.193405399 + -7 x = 18.193405399 + -7 Combine like terms: 18.193405399 + -7 = 11.193405399 x = 11.193405399 Simplifying x = 11.193405399

Subproblem 2

x + 7 = -18.193405399 Simplifying x + 7 = -18.193405399 Reorder the terms: 7 + x = -18.193405399 Solving 7 + x = -18.193405399 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -18.193405399 + -7 Combine like terms: 7 + -7 = 0 0 + x = -18.193405399 + -7 x = -18.193405399 + -7 Combine like terms: -18.193405399 + -7 = -25.193405399 x = -25.193405399 Simplifying x = -25.193405399

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.193405399, -25.193405399}

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