x^2-25(x-3)=0

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Solution for x^2-25(x-3)=0 equation:


Simplifying
x2 + -25(x + -3) = 0

Reorder the terms:
x2 + -25(-3 + x) = 0
x2 + (-3 * -25 + x * -25) = 0
x2 + (75 + -25x) = 0

Reorder the terms:
75 + -25x + x2 = 0

Solving
75 + -25x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-75' to each side of the equation.
75 + -25x + -75 + x2 = 0 + -75

Reorder the terms:
75 + -75 + -25x + x2 = 0 + -75

Combine like terms: 75 + -75 = 0
0 + -25x + x2 = 0 + -75
-25x + x2 = 0 + -75

Combine like terms: 0 + -75 = -75
-25x + x2 = -75

The x term is -25x.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x + 156.25 + x2 = -75 + 156.25

Reorder the terms:
156.25 + -25x + x2 = -75 + 156.25

Combine like terms: -75 + 156.25 = 81.25
156.25 + -25x + x2 = 81.25

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 81.25

Calculate the square root of the right side: 9.013878189

Break this problem into two subproblems by setting 
(x + -12.5) equal to 9.013878189 and -9.013878189.

Subproblem 1

x + -12.5 = 9.013878189 Simplifying x + -12.5 = 9.013878189 Reorder the terms: -12.5 + x = 9.013878189 Solving -12.5 + x = 9.013878189 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 9.013878189 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 9.013878189 + 12.5 x = 9.013878189 + 12.5 Combine like terms: 9.013878189 + 12.5 = 21.513878189 x = 21.513878189 Simplifying x = 21.513878189

Subproblem 2

x + -12.5 = -9.013878189 Simplifying x + -12.5 = -9.013878189 Reorder the terms: -12.5 + x = -9.013878189 Solving -12.5 + x = -9.013878189 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -9.013878189 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -9.013878189 + 12.5 x = -9.013878189 + 12.5 Combine like terms: -9.013878189 + 12.5 = 3.486121811 x = 3.486121811 Simplifying x = 3.486121811

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.513878189, 3.486121811}

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