3.2x^2-4.9x+1.2=0

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Solution for 3.2x^2-4.9x+1.2=0 equation:


Simplifying
3.2x2 + -4.9x + 1.2 = 0

Reorder the terms:
1.2 + -4.9x + 3.2x2 = 0

Solving
1.2 + -4.9x + 3.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '3.2'.
0.375 + -1.53125x + x2 = 0

Move the constant term to the right:

Add '-0.375' to each side of the equation.
0.375 + -1.53125x + -0.375 + x2 = 0 + -0.375

Reorder the terms:
0.375 + -0.375 + -1.53125x + x2 = 0 + -0.375

Combine like terms: 0.375 + -0.375 = 0.000
0.000 + -1.53125x + x2 = 0 + -0.375
-1.53125x + x2 = 0 + -0.375

Combine like terms: 0 + -0.375 = -0.375
-1.53125x + x2 = -0.375

The x term is -1.53125x.  Take half its coefficient (-0.765625).
Square it (0.5861816406) and add it to both sides.

Add '0.5861816406' to each side of the equation.
-1.53125x + 0.5861816406 + x2 = -0.375 + 0.5861816406

Reorder the terms:
0.5861816406 + -1.53125x + x2 = -0.375 + 0.5861816406

Combine like terms: -0.375 + 0.5861816406 = 0.2111816406
0.5861816406 + -1.53125x + x2 = 0.2111816406

Factor a perfect square on the left side:
(x + -0.765625)(x + -0.765625) = 0.2111816406

Calculate the square root of the right side: 0.459545037

Break this problem into two subproblems by setting 
(x + -0.765625) equal to 0.459545037 and -0.459545037.

Subproblem 1

x + -0.765625 = 0.459545037 Simplifying x + -0.765625 = 0.459545037 Reorder the terms: -0.765625 + x = 0.459545037 Solving -0.765625 + x = 0.459545037 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.765625' to each side of the equation. -0.765625 + 0.765625 + x = 0.459545037 + 0.765625 Combine like terms: -0.765625 + 0.765625 = 0.000000 0.000000 + x = 0.459545037 + 0.765625 x = 0.459545037 + 0.765625 Combine like terms: 0.459545037 + 0.765625 = 1.225170037 x = 1.225170037 Simplifying x = 1.225170037

Subproblem 2

x + -0.765625 = -0.459545037 Simplifying x + -0.765625 = -0.459545037 Reorder the terms: -0.765625 + x = -0.459545037 Solving -0.765625 + x = -0.459545037 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.765625' to each side of the equation. -0.765625 + 0.765625 + x = -0.459545037 + 0.765625 Combine like terms: -0.765625 + 0.765625 = 0.000000 0.000000 + x = -0.459545037 + 0.765625 x = -0.459545037 + 0.765625 Combine like terms: -0.459545037 + 0.765625 = 0.306079963 x = 0.306079963 Simplifying x = 0.306079963

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.225170037, 0.306079963}

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