x^2-30x=-25

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Solution for x^2-30x=-25 equation:


Simplifying
x2 + -30x = -25

Reorder the terms:
-30x + x2 = -25

Solving
-30x + x2 = -25

Solving for variable 'x'.

Reorder the terms:
25 + -30x + x2 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + -30x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + -30x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + -30x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -30x + x2 = 0 + -25
-30x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
-30x + x2 = -25

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 = -25 + 225

Reorder the terms:
225 + -30x + x2 = -25 + 225

Combine like terms: -25 + 225 = 200
225 + -30x + x2 = 200

Factor a perfect square on the left side:
(x + -15)(x + -15) = 200

Calculate the square root of the right side: 14.142135624

Break this problem into two subproblems by setting 
(x + -15) equal to 14.142135624 and -14.142135624.

Subproblem 1

x + -15 = 14.142135624 Simplifying x + -15 = 14.142135624 Reorder the terms: -15 + x = 14.142135624 Solving -15 + x = 14.142135624 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 = 14.142135624 + 15 Combine like terms: -15 + 15 = 0 0 + x = 14.142135624 + 15 x = 14.142135624 + 15 Combine like terms: 14.142135624 + 15 = 29.142135624 x = 29.142135624 Simplifying x = 29.142135624

Subproblem 2

x + -15 = -14.142135624 Simplifying x + -15 = -14.142135624 Reorder the terms: -15 + x = -14.142135624 Solving -15 + x = -14.142135624 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 = -14.142135624 + 15 Combine like terms: -15 + 15 = 0 0 + x = -14.142135624 + 15 x = -14.142135624 + 15 Combine like terms: -14.142135624 + 15 = 0.857864376 x = 0.857864376 Simplifying x = 0.857864376

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.142135624, 0.857864376}

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