5x^2+3.25x=1.5

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Solution for 5x^2+3.25x=1.5 equation:


Simplifying
5x2 + 3.25x = 1.5

Reorder the terms:
3.25x + 5x2 = 1.5

Solving
3.25x + 5x2 = 1.5

Solving for variable 'x'.

Reorder the terms:
-1.5 + 3.25x + 5x2 = 1.5 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
-1.5 + 3.25x + 5x2 = 0.0

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

Divide each side by '5'.
-0.3 + 0.65x + x2 = 0.0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + 0.65x + 0.3 + x2 = 0.0 + 0.3

Reorder the terms:
-0.3 + 0.3 + 0.65x + x2 = 0.0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + 0.65x + x2 = 0.0 + 0.3
0.65x + x2 = 0.0 + 0.3

Combine like terms: 0.0 + 0.3 = 0.3
0.65x + x2 = 0.3

The x term is 0.65x.  Take half its coefficient (0.325).
Square it (0.105625) and add it to both sides.

Add '0.105625' to each side of the equation.
0.65x + 0.105625 + x2 = 0.3 + 0.105625

Reorder the terms:
0.105625 + 0.65x + x2 = 0.3 + 0.105625

Combine like terms: 0.3 + 0.105625 = 0.405625
0.105625 + 0.65x + x2 = 0.405625

Factor a perfect square on the left side:
(x + 0.325)(x + 0.325) = 0.405625

Calculate the square root of the right side: 0.63688696

Break this problem into two subproblems by setting 
(x + 0.325) equal to 0.63688696 and -0.63688696.

Subproblem 1

x + 0.325 = 0.63688696 Simplifying x + 0.325 = 0.63688696 Reorder the terms: 0.325 + x = 0.63688696 Solving 0.325 + x = 0.63688696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.325' to each side of the equation. 0.325 + -0.325 + x = 0.63688696 + -0.325 Combine like terms: 0.325 + -0.325 = 0.000 0.000 + x = 0.63688696 + -0.325 x = 0.63688696 + -0.325 Combine like terms: 0.63688696 + -0.325 = 0.31188696 x = 0.31188696 Simplifying x = 0.31188696

Subproblem 2

x + 0.325 = -0.63688696 Simplifying x + 0.325 = -0.63688696 Reorder the terms: 0.325 + x = -0.63688696 Solving 0.325 + x = -0.63688696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.325' to each side of the equation. 0.325 + -0.325 + x = -0.63688696 + -0.325 Combine like terms: 0.325 + -0.325 = 0.000 0.000 + x = -0.63688696 + -0.325 x = -0.63688696 + -0.325 Combine like terms: -0.63688696 + -0.325 = -0.96188696 x = -0.96188696 Simplifying x = -0.96188696

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.31188696, -0.96188696}

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