(4x-1)(2x+3)=9x

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Solution for (4x-1)(2x+3)=9x equation:


Simplifying
(4x + -1)(2x + 3) = 9x

Reorder the terms:
(-1 + 4x)(2x + 3) = 9x

Reorder the terms:
(-1 + 4x)(3 + 2x) = 9x

Multiply (-1 + 4x) * (3 + 2x)
(-1(3 + 2x) + 4x * (3 + 2x)) = 9x
((3 * -1 + 2x * -1) + 4x * (3 + 2x)) = 9x
((-3 + -2x) + 4x * (3 + 2x)) = 9x
(-3 + -2x + (3 * 4x + 2x * 4x)) = 9x
(-3 + -2x + (12x + 8x2)) = 9x

Combine like terms: -2x + 12x = 10x
(-3 + 10x + 8x2) = 9x

Solving
-3 + 10x + 8x2 = 9x

Solving for variable 'x'.

Reorder the terms:
-3 + 10x + -9x + 8x2 = 9x + -9x

Combine like terms: 10x + -9x = 1x
-3 + 1x + 8x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-3 + 1x + 8x2 = 0

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

Divide each side by '8'.
-0.375 + 0.125x + x2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + 0.125x + 0.375 + x2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + 0.125x + x2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + 0.125x + x2 = 0 + 0.375
0.125x + x2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
0.125x + x2 = 0.375

The x term is 0.125x.  Take half its coefficient (0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
0.125x + 0.00390625 + x2 = 0.375 + 0.00390625

Reorder the terms:
0.00390625 + 0.125x + x2 = 0.375 + 0.00390625

Combine like terms: 0.375 + 0.00390625 = 0.37890625
0.00390625 + 0.125x + x2 = 0.37890625

Factor a perfect square on the left side:
(x + 0.0625)(x + 0.0625) = 0.37890625

Calculate the square root of the right side: 0.615553613

Break this problem into two subproblems by setting 
(x + 0.0625) equal to 0.615553613 and -0.615553613.

Subproblem 1

x + 0.0625 = 0.615553613 Simplifying x + 0.0625 = 0.615553613 Reorder the terms: 0.0625 + x = 0.615553613 Solving 0.0625 + x = 0.615553613 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0625' to each side of the equation. 0.0625 + -0.0625 + x = 0.615553613 + -0.0625 Combine like terms: 0.0625 + -0.0625 = 0.0000 0.0000 + x = 0.615553613 + -0.0625 x = 0.615553613 + -0.0625 Combine like terms: 0.615553613 + -0.0625 = 0.553053613 x = 0.553053613 Simplifying x = 0.553053613

Subproblem 2

x + 0.0625 = -0.615553613 Simplifying x + 0.0625 = -0.615553613 Reorder the terms: 0.0625 + x = -0.615553613 Solving 0.0625 + x = -0.615553613 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0625' to each side of the equation. 0.0625 + -0.0625 + x = -0.615553613 + -0.0625 Combine like terms: 0.0625 + -0.0625 = 0.0000 0.0000 + x = -0.615553613 + -0.0625 x = -0.615553613 + -0.0625 Combine like terms: -0.615553613 + -0.0625 = -0.678053613 x = -0.678053613 Simplifying x = -0.678053613

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.553053613, -0.678053613}

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