x^2+7x=190

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Solution for x^2+7x=190 equation:


Simplifying
x2 + 7x = 190

Reorder the terms:
7x + x2 = 190

Solving
7x + x2 = 190

Solving for variable 'x'.

Reorder the terms:
-190 + 7x + x2 = 190 + -190

Combine like terms: 190 + -190 = 0
-190 + 7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '190' to each side of the equation.
-190 + 7x + 190 + x2 = 0 + 190

Reorder the terms:
-190 + 190 + 7x + x2 = 0 + 190

Combine like terms: -190 + 190 = 0
0 + 7x + x2 = 0 + 190
7x + x2 = 0 + 190

Combine like terms: 0 + 190 = 190
7x + x2 = 190

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 190 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 190 + 12.25

Combine like terms: 190 + 12.25 = 202.25
12.25 + 7x + x2 = 202.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 202.25

Calculate the square root of the right side: 14.221462653

Break this problem into two subproblems by setting 
(x + 3.5) equal to 14.221462653 and -14.221462653.

Subproblem 1

x + 3.5 = 14.221462653 Simplifying x + 3.5 = 14.221462653 Reorder the terms: 3.5 + x = 14.221462653 Solving 3.5 + x = 14.221462653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 14.221462653 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 14.221462653 + -3.5 x = 14.221462653 + -3.5 Combine like terms: 14.221462653 + -3.5 = 10.721462653 x = 10.721462653 Simplifying x = 10.721462653

Subproblem 2

x + 3.5 = -14.221462653 Simplifying x + 3.5 = -14.221462653 Reorder the terms: 3.5 + x = -14.221462653 Solving 3.5 + x = -14.221462653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -14.221462653 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -14.221462653 + -3.5 x = -14.221462653 + -3.5 Combine like terms: -14.221462653 + -3.5 = -17.721462653 x = -17.721462653 Simplifying x = -17.721462653

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.721462653, -17.721462653}

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