(4x-2)(5x-3)-25x+9=0

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Solution for (4x-2)(5x-3)-25x+9=0 equation:


Simplifying
(4x + -2)(5x + -3) + -25x + 9 = 0

Reorder the terms:
(-2 + 4x)(5x + -3) + -25x + 9 = 0

Reorder the terms:
(-2 + 4x)(-3 + 5x) + -25x + 9 = 0

Multiply (-2 + 4x) * (-3 + 5x)
(-2(-3 + 5x) + 4x * (-3 + 5x)) + -25x + 9 = 0
((-3 * -2 + 5x * -2) + 4x * (-3 + 5x)) + -25x + 9 = 0
((6 + -10x) + 4x * (-3 + 5x)) + -25x + 9 = 0
(6 + -10x + (-3 * 4x + 5x * 4x)) + -25x + 9 = 0
(6 + -10x + (-12x + 20x2)) + -25x + 9 = 0

Combine like terms: -10x + -12x = -22x
(6 + -22x + 20x2) + -25x + 9 = 0

Reorder the terms:
6 + 9 + -22x + -25x + 20x2 = 0

Combine like terms: 6 + 9 = 15
15 + -22x + -25x + 20x2 = 0

Combine like terms: -22x + -25x = -47x
15 + -47x + 20x2 = 0

Solving
15 + -47x + 20x2 = 0

Solving for variable 'x'.

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

Divide each side by '20'.
0.75 + -2.35x + x2 = 0.0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -2.35x + -0.75 + x2 = 0.0 + -0.75

Reorder the terms:
0.75 + -0.75 + -2.35x + x2 = 0.0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -2.35x + x2 = 0.0 + -0.75
-2.35x + x2 = 0.0 + -0.75

Combine like terms: 0.0 + -0.75 = -0.75
-2.35x + x2 = -0.75

The x term is -2.35x.  Take half its coefficient (-1.175).
Square it (1.380625) and add it to both sides.

Add '1.380625' to each side of the equation.
-2.35x + 1.380625 + x2 = -0.75 + 1.380625

Reorder the terms:
1.380625 + -2.35x + x2 = -0.75 + 1.380625

Combine like terms: -0.75 + 1.380625 = 0.630625
1.380625 + -2.35x + x2 = 0.630625

Factor a perfect square on the left side:
(x + -1.175)(x + -1.175) = 0.630625

Calculate the square root of the right side: 0.794119009

Break this problem into two subproblems by setting 
(x + -1.175) equal to 0.794119009 and -0.794119009.

Subproblem 1

x + -1.175 = 0.794119009 Simplifying x + -1.175 = 0.794119009 Reorder the terms: -1.175 + x = 0.794119009 Solving -1.175 + x = 0.794119009 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.175' to each side of the equation. -1.175 + 1.175 + x = 0.794119009 + 1.175 Combine like terms: -1.175 + 1.175 = 0.000 0.000 + x = 0.794119009 + 1.175 x = 0.794119009 + 1.175 Combine like terms: 0.794119009 + 1.175 = 1.969119009 x = 1.969119009 Simplifying x = 1.969119009

Subproblem 2

x + -1.175 = -0.794119009 Simplifying x + -1.175 = -0.794119009 Reorder the terms: -1.175 + x = -0.794119009 Solving -1.175 + x = -0.794119009 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.175' to each side of the equation. -1.175 + 1.175 + x = -0.794119009 + 1.175 Combine like terms: -1.175 + 1.175 = 0.000 0.000 + x = -0.794119009 + 1.175 x = -0.794119009 + 1.175 Combine like terms: -0.794119009 + 1.175 = 0.380880991 x = 0.380880991 Simplifying x = 0.380880991

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.969119009, 0.380880991}

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