x^2+1.2x-.35=0

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Solution for x^2+1.2x-.35=0 equation:


Simplifying
x2 + 1.2x + -0.35 = 0

Reorder the terms:
-0.35 + 1.2x + x2 = 0

Solving
-0.35 + 1.2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.35' to each side of the equation.
-0.35 + 1.2x + 0.35 + x2 = 0 + 0.35

Reorder the terms:
-0.35 + 0.35 + 1.2x + x2 = 0 + 0.35

Combine like terms: -0.35 + 0.35 = 0.00
0.00 + 1.2x + x2 = 0 + 0.35
1.2x + x2 = 0 + 0.35

Combine like terms: 0 + 0.35 = 0.35
1.2x + x2 = 0.35

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = 0.35 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = 0.35 + 0.36

Combine like terms: 0.35 + 0.36 = 0.71
0.36 + 1.2x + x2 = 0.71

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 0.71

Calculate the square root of the right side: 0.842614977

Break this problem into two subproblems by setting 
(x + 0.6) equal to 0.842614977 and -0.842614977.

Subproblem 1

x + 0.6 = 0.842614977 Simplifying x + 0.6 = 0.842614977 Reorder the terms: 0.6 + x = 0.842614977 Solving 0.6 + x = 0.842614977 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 0.842614977 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 0.842614977 + -0.6 x = 0.842614977 + -0.6 Combine like terms: 0.842614977 + -0.6 = 0.242614977 x = 0.242614977 Simplifying x = 0.242614977

Subproblem 2

x + 0.6 = -0.842614977 Simplifying x + 0.6 = -0.842614977 Reorder the terms: 0.6 + x = -0.842614977 Solving 0.6 + x = -0.842614977 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -0.842614977 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -0.842614977 + -0.6 x = -0.842614977 + -0.6 Combine like terms: -0.842614977 + -0.6 = -1.442614977 x = -1.442614977 Simplifying x = -1.442614977

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.242614977, -1.442614977}

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