x^2-30x=35

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Solution for x^2-30x=35 equation:


Simplifying
x2 + -30x = 35

Reorder the terms:
-30x + x2 = 35

Solving
-30x + x2 = 35

Solving for variable 'x'.

Reorder the terms:
-35 + -30x + x2 = 35 + -35

Combine like terms: 35 + -35 = 0
-35 + -30x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + -30x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + -30x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -30x + x2 = 0 + 35
-30x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
-30x + x2 = 35

The x term is -30x.  Take half its coefficient (-15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
-30x + 225 + x2 = 35 + 225

Reorder the terms:
225 + -30x + x2 = 35 + 225

Combine like terms: 35 + 225 = 260
225 + -30x + x2 = 260

Factor a perfect square on the left side:
(x + -15)(x + -15) = 260

Calculate the square root of the right side: 16.124515497

Break this problem into two subproblems by setting 
(x + -15) equal to 16.124515497 and -16.124515497.

Subproblem 1

x + -15 = 16.124515497 Simplifying x + -15 = 16.124515497 Reorder the terms: -15 + x = 16.124515497 Solving -15 + x = 16.124515497 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = 16.124515497 + 15 Combine like terms: -15 + 15 = 0 0 + x = 16.124515497 + 15 x = 16.124515497 + 15 Combine like terms: 16.124515497 + 15 = 31.124515497 x = 31.124515497 Simplifying x = 31.124515497

Subproblem 2

x + -15 = -16.124515497 Simplifying x + -15 = -16.124515497 Reorder the terms: -15 + x = -16.124515497 Solving -15 + x = -16.124515497 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = -16.124515497 + 15 Combine like terms: -15 + 15 = 0 0 + x = -16.124515497 + 15 x = -16.124515497 + 15 Combine like terms: -16.124515497 + 15 = -1.124515497 x = -1.124515497 Simplifying x = -1.124515497

Solution

The solution to the problem is based on the solutions from the subproblems. x = {31.124515497, -1.124515497}

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