x^2+4x-45=270

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Solution for x^2+4x-45=270 equation:


Simplifying
x2 + 4x + -45 = 270

Reorder the terms:
-45 + 4x + x2 = 270

Solving
-45 + 4x + x2 = 270

Solving for variable 'x'.

Reorder the terms:
-45 + -270 + 4x + x2 = 270 + -270

Combine like terms: -45 + -270 = -315
-315 + 4x + x2 = 270 + -270

Combine like terms: 270 + -270 = 0
-315 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '315' to each side of the equation.
-315 + 4x + 315 + x2 = 0 + 315

Reorder the terms:
-315 + 315 + 4x + x2 = 0 + 315

Combine like terms: -315 + 315 = 0
0 + 4x + x2 = 0 + 315
4x + x2 = 0 + 315

Combine like terms: 0 + 315 = 315
4x + x2 = 315

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 315 + 4

Reorder the terms:
4 + 4x + x2 = 315 + 4

Combine like terms: 315 + 4 = 319
4 + 4x + x2 = 319

Factor a perfect square on the left side:
(x + 2)(x + 2) = 319

Calculate the square root of the right side: 17.860571099

Break this problem into two subproblems by setting 
(x + 2) equal to 17.860571099 and -17.860571099.

Subproblem 1

x + 2 = 17.860571099 Simplifying x + 2 = 17.860571099 Reorder the terms: 2 + x = 17.860571099 Solving 2 + x = 17.860571099 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 17.860571099 + -2 Combine like terms: 2 + -2 = 0 0 + x = 17.860571099 + -2 x = 17.860571099 + -2 Combine like terms: 17.860571099 + -2 = 15.860571099 x = 15.860571099 Simplifying x = 15.860571099

Subproblem 2

x + 2 = -17.860571099 Simplifying x + 2 = -17.860571099 Reorder the terms: 2 + x = -17.860571099 Solving 2 + x = -17.860571099 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -17.860571099 + -2 Combine like terms: 2 + -2 = 0 0 + x = -17.860571099 + -2 x = -17.860571099 + -2 Combine like terms: -17.860571099 + -2 = -19.860571099 x = -19.860571099 Simplifying x = -19.860571099

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.860571099, -19.860571099}

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