2x^2+1.5x+.28=

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Solution for 2x^2+1.5x+.28= equation:


Simplifying
2x2 + 1.5x + 0.28 = 0

Reorder the terms:
0.28 + 1.5x + 2x2 = 0

Solving
0.28 + 1.5x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
0.14 + 0.75x + x2 = 0

Move the constant term to the right:

Add '-0.14' to each side of the equation.
0.14 + 0.75x + -0.14 + x2 = 0 + -0.14

Reorder the terms:
0.14 + -0.14 + 0.75x + x2 = 0 + -0.14

Combine like terms: 0.14 + -0.14 = 0.00
0.00 + 0.75x + x2 = 0 + -0.14
0.75x + x2 = 0 + -0.14

Combine like terms: 0 + -0.14 = -0.14
0.75x + x2 = -0.14

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = -0.14 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = -0.14 + 0.140625

Combine like terms: -0.14 + 0.140625 = 0.000625
0.140625 + 0.75x + x2 = 0.000625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 0.000625

Calculate the square root of the right side: 0.025

Break this problem into two subproblems by setting 
(x + 0.375) equal to 0.025 and -0.025.

Subproblem 1

x + 0.375 = 0.025 Simplifying x + 0.375 = 0.025 Reorder the terms: 0.375 + x = 0.025 Solving 0.375 + x = 0.025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 0.025 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 0.025 + -0.375 x = 0.025 + -0.375 Combine like terms: 0.025 + -0.375 = -0.35 x = -0.35 Simplifying x = -0.35

Subproblem 2

x + 0.375 = -0.025 Simplifying x + 0.375 = -0.025 Reorder the terms: 0.375 + x = -0.025 Solving 0.375 + x = -0.025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -0.025 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -0.025 + -0.375 x = -0.025 + -0.375 Combine like terms: -0.025 + -0.375 = -0.4 x = -0.4 Simplifying x = -0.4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.35, -0.4}

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