(4x-7)(9x+5)=(8x-3)(4x+7)

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Solution for (4x-7)(9x+5)=(8x-3)(4x+7) equation:


Simplifying
(4x + -7)(9x + 5) = (8x + -3)(4x + 7)

Reorder the terms:
(-7 + 4x)(9x + 5) = (8x + -3)(4x + 7)

Reorder the terms:
(-7 + 4x)(5 + 9x) = (8x + -3)(4x + 7)

Multiply (-7 + 4x) * (5 + 9x)
(-7(5 + 9x) + 4x * (5 + 9x)) = (8x + -3)(4x + 7)
((5 * -7 + 9x * -7) + 4x * (5 + 9x)) = (8x + -3)(4x + 7)
((-35 + -63x) + 4x * (5 + 9x)) = (8x + -3)(4x + 7)
(-35 + -63x + (5 * 4x + 9x * 4x)) = (8x + -3)(4x + 7)
(-35 + -63x + (20x + 36x2)) = (8x + -3)(4x + 7)

Combine like terms: -63x + 20x = -43x
(-35 + -43x + 36x2) = (8x + -3)(4x + 7)

Reorder the terms:
-35 + -43x + 36x2 = (-3 + 8x)(4x + 7)

Reorder the terms:
-35 + -43x + 36x2 = (-3 + 8x)(7 + 4x)

Multiply (-3 + 8x) * (7 + 4x)
-35 + -43x + 36x2 = (-3(7 + 4x) + 8x * (7 + 4x))
-35 + -43x + 36x2 = ((7 * -3 + 4x * -3) + 8x * (7 + 4x))
-35 + -43x + 36x2 = ((-21 + -12x) + 8x * (7 + 4x))
-35 + -43x + 36x2 = (-21 + -12x + (7 * 8x + 4x * 8x))
-35 + -43x + 36x2 = (-21 + -12x + (56x + 32x2))

Combine like terms: -12x + 56x = 44x
-35 + -43x + 36x2 = (-21 + 44x + 32x2)

Solving
-35 + -43x + 36x2 = -21 + 44x + 32x2

Solving for variable 'x'.

Reorder the terms:
-35 + 21 + -43x + -44x + 36x2 + -32x2 = -21 + 44x + 32x2 + 21 + -44x + -32x2

Combine like terms: -35 + 21 = -14
-14 + -43x + -44x + 36x2 + -32x2 = -21 + 44x + 32x2 + 21 + -44x + -32x2

Combine like terms: -43x + -44x = -87x
-14 + -87x + 36x2 + -32x2 = -21 + 44x + 32x2 + 21 + -44x + -32x2

Combine like terms: 36x2 + -32x2 = 4x2
-14 + -87x + 4x2 = -21 + 44x + 32x2 + 21 + -44x + -32x2

Reorder the terms:
-14 + -87x + 4x2 = -21 + 21 + 44x + -44x + 32x2 + -32x2

Combine like terms: -21 + 21 = 0
-14 + -87x + 4x2 = 0 + 44x + -44x + 32x2 + -32x2
-14 + -87x + 4x2 = 44x + -44x + 32x2 + -32x2

Combine like terms: 44x + -44x = 0
-14 + -87x + 4x2 = 0 + 32x2 + -32x2
-14 + -87x + 4x2 = 32x2 + -32x2

Combine like terms: 32x2 + -32x2 = 0
-14 + -87x + 4x2 = 0

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

Divide each side by '4'.
-3.5 + -21.75x + x2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + -21.75x + 3.5 + x2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + -21.75x + x2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -21.75x + x2 = 0 + 3.5
-21.75x + x2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
-21.75x + x2 = 3.5

The x term is -21.75x.  Take half its coefficient (-10.875).
Square it (118.265625) and add it to both sides.

Add '118.265625' to each side of the equation.
-21.75x + 118.265625 + x2 = 3.5 + 118.265625

Reorder the terms:
118.265625 + -21.75x + x2 = 3.5 + 118.265625

Combine like terms: 3.5 + 118.265625 = 121.765625
118.265625 + -21.75x + x2 = 121.765625

Factor a perfect square on the left side:
(x + -10.875)(x + -10.875) = 121.765625

Calculate the square root of the right side: 11.034746259

Break this problem into two subproblems by setting 
(x + -10.875) equal to 11.034746259 and -11.034746259.

Subproblem 1

x + -10.875 = 11.034746259 Simplifying x + -10.875 = 11.034746259 Reorder the terms: -10.875 + x = 11.034746259 Solving -10.875 + x = 11.034746259 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.875' to each side of the equation. -10.875 + 10.875 + x = 11.034746259 + 10.875 Combine like terms: -10.875 + 10.875 = 0.000 0.000 + x = 11.034746259 + 10.875 x = 11.034746259 + 10.875 Combine like terms: 11.034746259 + 10.875 = 21.909746259 x = 21.909746259 Simplifying x = 21.909746259

Subproblem 2

x + -10.875 = -11.034746259 Simplifying x + -10.875 = -11.034746259 Reorder the terms: -10.875 + x = -11.034746259 Solving -10.875 + x = -11.034746259 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.875' to each side of the equation. -10.875 + 10.875 + x = -11.034746259 + 10.875 Combine like terms: -10.875 + 10.875 = 0.000 0.000 + x = -11.034746259 + 10.875 x = -11.034746259 + 10.875 Combine like terms: -11.034746259 + 10.875 = -0.159746259 x = -0.159746259 Simplifying x = -0.159746259

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.909746259, -0.159746259}

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