4x^2-121x+225=0

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Solution for 4x^2-121x+225=0 equation:


Simplifying
4x2 + -121x + 225 = 0

Reorder the terms:
225 + -121x + 4x2 = 0

Solving
225 + -121x + 4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
56.25 + -30.25x + x2 = 0

Move the constant term to the right:

Add '-56.25' to each side of the equation.
56.25 + -30.25x + -56.25 + x2 = 0 + -56.25

Reorder the terms:
56.25 + -56.25 + -30.25x + x2 = 0 + -56.25

Combine like terms: 56.25 + -56.25 = 0.00
0.00 + -30.25x + x2 = 0 + -56.25
-30.25x + x2 = 0 + -56.25

Combine like terms: 0 + -56.25 = -56.25
-30.25x + x2 = -56.25

The x term is -30.25x.  Take half its coefficient (-15.125).
Square it (228.765625) and add it to both sides.

Add '228.765625' to each side of the equation.
-30.25x + 228.765625 + x2 = -56.25 + 228.765625

Reorder the terms:
228.765625 + -30.25x + x2 = -56.25 + 228.765625

Combine like terms: -56.25 + 228.765625 = 172.515625
228.765625 + -30.25x + x2 = 172.515625

Factor a perfect square on the left side:
(x + -15.125)(x + -15.125) = 172.515625

Calculate the square root of the right side: 13.134520357

Break this problem into two subproblems by setting 
(x + -15.125) equal to 13.134520357 and -13.134520357.

Subproblem 1

x + -15.125 = 13.134520357 Simplifying x + -15.125 = 13.134520357 Reorder the terms: -15.125 + x = 13.134520357 Solving -15.125 + x = 13.134520357 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.125' to each side of the equation. -15.125 + 15.125 + x = 13.134520357 + 15.125 Combine like terms: -15.125 + 15.125 = 0.000 0.000 + x = 13.134520357 + 15.125 x = 13.134520357 + 15.125 Combine like terms: 13.134520357 + 15.125 = 28.259520357 x = 28.259520357 Simplifying x = 28.259520357

Subproblem 2

x + -15.125 = -13.134520357 Simplifying x + -15.125 = -13.134520357 Reorder the terms: -15.125 + x = -13.134520357 Solving -15.125 + x = -13.134520357 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.125' to each side of the equation. -15.125 + 15.125 + x = -13.134520357 + 15.125 Combine like terms: -15.125 + 15.125 = 0.000 0.000 + x = -13.134520357 + 15.125 x = -13.134520357 + 15.125 Combine like terms: -13.134520357 + 15.125 = 1.990479643 x = 1.990479643 Simplifying x = 1.990479643

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.259520357, 1.990479643}

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