4x^2+4.65x=.65

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Solution for 4x^2+4.65x=.65 equation:


Simplifying
4x2 + 4.65x = 0.65

Reorder the terms:
4.65x + 4x2 = 0.65

Solving
4.65x + 4x2 = 0.65

Solving for variable 'x'.

Reorder the terms:
-0.65 + 4.65x + 4x2 = 0.65 + -0.65

Combine like terms: 0.65 + -0.65 = 0.00
-0.65 + 4.65x + 4x2 = 0.00

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

Divide each side by '4'.
-0.1625 + 1.1625x + x2 = 0.00

Move the constant term to the right:

Add '0.1625' to each side of the equation.
-0.1625 + 1.1625x + 0.1625 + x2 = 0.00 + 0.1625

Reorder the terms:
-0.1625 + 0.1625 + 1.1625x + x2 = 0.00 + 0.1625

Combine like terms: -0.1625 + 0.1625 = 0.0000
0.0000 + 1.1625x + x2 = 0.00 + 0.1625
1.1625x + x2 = 0.00 + 0.1625

Combine like terms: 0.00 + 0.1625 = 0.1625
1.1625x + x2 = 0.1625

The x term is 1.1625x.  Take half its coefficient (0.58125).
Square it (0.3378515625) and add it to both sides.

Add '0.3378515625' to each side of the equation.
1.1625x + 0.3378515625 + x2 = 0.1625 + 0.3378515625

Reorder the terms:
0.3378515625 + 1.1625x + x2 = 0.1625 + 0.3378515625

Combine like terms: 0.1625 + 0.3378515625 = 0.5003515625
0.3378515625 + 1.1625x + x2 = 0.5003515625

Factor a perfect square on the left side:
(x + 0.58125)(x + 0.58125) = 0.5003515625

Calculate the square root of the right side: 0.70735533

Break this problem into two subproblems by setting 
(x + 0.58125) equal to 0.70735533 and -0.70735533.

Subproblem 1

x + 0.58125 = 0.70735533 Simplifying x + 0.58125 = 0.70735533 Reorder the terms: 0.58125 + x = 0.70735533 Solving 0.58125 + x = 0.70735533 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.58125' to each side of the equation. 0.58125 + -0.58125 + x = 0.70735533 + -0.58125 Combine like terms: 0.58125 + -0.58125 = 0.00000 0.00000 + x = 0.70735533 + -0.58125 x = 0.70735533 + -0.58125 Combine like terms: 0.70735533 + -0.58125 = 0.12610533 x = 0.12610533 Simplifying x = 0.12610533

Subproblem 2

x + 0.58125 = -0.70735533 Simplifying x + 0.58125 = -0.70735533 Reorder the terms: 0.58125 + x = -0.70735533 Solving 0.58125 + x = -0.70735533 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.58125' to each side of the equation. 0.58125 + -0.58125 + x = -0.70735533 + -0.58125 Combine like terms: 0.58125 + -0.58125 = 0.00000 0.00000 + x = -0.70735533 + -0.58125 x = -0.70735533 + -0.58125 Combine like terms: -0.70735533 + -0.58125 = -1.28860533 x = -1.28860533 Simplifying x = -1.28860533

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.12610533, -1.28860533}

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