4x^2-121x+885=0

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Solution for 4x^2-121x+885=0 equation:


Simplifying
4x2 + -121x + 885 = 0

Reorder the terms:
885 + -121x + 4x2 = 0

Solving
885 + -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'.
221.25 + -30.25x + x2 = 0

Move the constant term to the right:

Add '-221.25' to each side of the equation.
221.25 + -30.25x + -221.25 + x2 = 0 + -221.25

Reorder the terms:
221.25 + -221.25 + -30.25x + x2 = 0 + -221.25

Combine like terms: 221.25 + -221.25 = 0.00
0.00 + -30.25x + x2 = 0 + -221.25
-30.25x + x2 = 0 + -221.25

Combine like terms: 0 + -221.25 = -221.25
-30.25x + x2 = -221.25

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 = -221.25 + 228.765625

Reorder the terms:
228.765625 + -30.25x + x2 = -221.25 + 228.765625

Combine like terms: -221.25 + 228.765625 = 7.515625
228.765625 + -30.25x + x2 = 7.515625

Factor a perfect square on the left side:
(x + -15.125)(x + -15.125) = 7.515625

Calculate the square root of the right side: 2.741464025

Break this problem into two subproblems by setting 
(x + -15.125) equal to 2.741464025 and -2.741464025.

Subproblem 1

x + -15.125 = 2.741464025 Simplifying x + -15.125 = 2.741464025 Reorder the terms: -15.125 + x = 2.741464025 Solving -15.125 + x = 2.741464025 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 = 2.741464025 + 15.125 Combine like terms: -15.125 + 15.125 = 0.000 0.000 + x = 2.741464025 + 15.125 x = 2.741464025 + 15.125 Combine like terms: 2.741464025 + 15.125 = 17.866464025 x = 17.866464025 Simplifying x = 17.866464025

Subproblem 2

x + -15.125 = -2.741464025 Simplifying x + -15.125 = -2.741464025 Reorder the terms: -15.125 + x = -2.741464025 Solving -15.125 + x = -2.741464025 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 = -2.741464025 + 15.125 Combine like terms: -15.125 + 15.125 = 0.000 0.000 + x = -2.741464025 + 15.125 x = -2.741464025 + 15.125 Combine like terms: -2.741464025 + 15.125 = 12.383535975 x = 12.383535975 Simplifying x = 12.383535975

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.866464025, 12.383535975}

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