4.2x^2-6.3x+2.3625=x^2

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Solution for 4.2x^2-6.3x+2.3625=x^2 equation:


Simplifying
4.2x2 + -6.3x + 2.3625 = x2

Reorder the terms:
2.3625 + -6.3x + 4.2x2 = x2

Solving
2.3625 + -6.3x + 4.2x2 = x2

Solving for variable 'x'.

Combine like terms: 4.2x2 + -1x2 = 3.2x2
2.3625 + -6.3x + 3.2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
2.3625 + -6.3x + 3.2x2 = 0

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

Divide each side by '3.2'.
0.73828125 + -1.96875x + x2 = 0

Move the constant term to the right:

Add '-0.73828125' to each side of the equation.
0.73828125 + -1.96875x + -0.73828125 + x2 = 0 + -0.73828125

Reorder the terms:
0.73828125 + -0.73828125 + -1.96875x + x2 = 0 + -0.73828125

Combine like terms: 0.73828125 + -0.73828125 = 0.00000000
0.00000000 + -1.96875x + x2 = 0 + -0.73828125
-1.96875x + x2 = 0 + -0.73828125

Combine like terms: 0 + -0.73828125 = -0.73828125
-1.96875x + x2 = -0.73828125

The x term is -1.96875x.  Take half its coefficient (-0.984375).
Square it (0.9689941406) and add it to both sides.

Add '0.9689941406' to each side of the equation.
-1.96875x + 0.9689941406 + x2 = -0.73828125 + 0.9689941406

Reorder the terms:
0.9689941406 + -1.96875x + x2 = -0.73828125 + 0.9689941406

Combine like terms: -0.73828125 + 0.9689941406 = 0.2307128906
0.9689941406 + -1.96875x + x2 = 0.2307128906

Factor a perfect square on the left side:
(x + -0.984375)(x + -0.984375) = 0.2307128906

Calculate the square root of the right side: 0.480325817

Break this problem into two subproblems by setting 
(x + -0.984375) equal to 0.480325817 and -0.480325817.

Subproblem 1

x + -0.984375 = 0.480325817 Simplifying x + -0.984375 = 0.480325817 Reorder the terms: -0.984375 + x = 0.480325817 Solving -0.984375 + x = 0.480325817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.984375' to each side of the equation. -0.984375 + 0.984375 + x = 0.480325817 + 0.984375 Combine like terms: -0.984375 + 0.984375 = 0.000000 0.000000 + x = 0.480325817 + 0.984375 x = 0.480325817 + 0.984375 Combine like terms: 0.480325817 + 0.984375 = 1.464700817 x = 1.464700817 Simplifying x = 1.464700817

Subproblem 2

x + -0.984375 = -0.480325817 Simplifying x + -0.984375 = -0.480325817 Reorder the terms: -0.984375 + x = -0.480325817 Solving -0.984375 + x = -0.480325817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.984375' to each side of the equation. -0.984375 + 0.984375 + x = -0.480325817 + 0.984375 Combine like terms: -0.984375 + 0.984375 = 0.000000 0.000000 + x = -0.480325817 + 0.984375 x = -0.480325817 + 0.984375 Combine like terms: -0.480325817 + 0.984375 = 0.504049183 x = 0.504049183 Simplifying x = 0.504049183

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.464700817, 0.504049183}

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