(2x-5)2-(x+2)(3-4x)=

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


Simplifying
(2x + -5) * 2 + -1(x + 2)(3 + -4x) = 0

Reorder the terms:
(-5 + 2x) * 2 + -1(x + 2)(3 + -4x) = 0

Reorder the terms for easier multiplication:
2(-5 + 2x) + -1(x + 2)(3 + -4x) = 0
(-5 * 2 + 2x * 2) + -1(x + 2)(3 + -4x) = 0
(-10 + 4x) + -1(x + 2)(3 + -4x) = 0

Reorder the terms:
-10 + 4x + -1(2 + x)(3 + -4x) = 0

Multiply (2 + x) * (3 + -4x)
-10 + 4x + -1(2(3 + -4x) + x(3 + -4x)) = 0
-10 + 4x + -1((3 * 2 + -4x * 2) + x(3 + -4x)) = 0
-10 + 4x + -1((6 + -8x) + x(3 + -4x)) = 0
-10 + 4x + -1(6 + -8x + (3 * x + -4x * x)) = 0
-10 + 4x + -1(6 + -8x + (3x + -4x2)) = 0

Combine like terms: -8x + 3x = -5x
-10 + 4x + -1(6 + -5x + -4x2) = 0
-10 + 4x + (6 * -1 + -5x * -1 + -4x2 * -1) = 0
-10 + 4x + (-6 + 5x + 4x2) = 0

Reorder the terms:
-10 + -6 + 4x + 5x + 4x2 = 0

Combine like terms: -10 + -6 = -16
-16 + 4x + 5x + 4x2 = 0

Combine like terms: 4x + 5x = 9x
-16 + 9x + 4x2 = 0

Solving
-16 + 9x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-4 + 2.25x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 2.25x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 2.25x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 2.25x + x2 = 0 + 4
2.25x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
2.25x + x2 = 4

The x term is 2.25x.  Take half its coefficient (1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
2.25x + 1.265625 + x2 = 4 + 1.265625

Reorder the terms:
1.265625 + 2.25x + x2 = 4 + 1.265625

Combine like terms: 4 + 1.265625 = 5.265625
1.265625 + 2.25x + x2 = 5.265625

Factor a perfect square on the left side:
(x + 1.125)(x + 1.125) = 5.265625

Calculate the square root of the right side: 2.294694969

Break this problem into two subproblems by setting 
(x + 1.125) equal to 2.294694969 and -2.294694969.

Subproblem 1

x + 1.125 = 2.294694969 Simplifying x + 1.125 = 2.294694969 Reorder the terms: 1.125 + x = 2.294694969 Solving 1.125 + x = 2.294694969 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + x = 2.294694969 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = 2.294694969 + -1.125 x = 2.294694969 + -1.125 Combine like terms: 2.294694969 + -1.125 = 1.169694969 x = 1.169694969 Simplifying x = 1.169694969

Subproblem 2

x + 1.125 = -2.294694969 Simplifying x + 1.125 = -2.294694969 Reorder the terms: 1.125 + x = -2.294694969 Solving 1.125 + x = -2.294694969 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + x = -2.294694969 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = -2.294694969 + -1.125 x = -2.294694969 + -1.125 Combine like terms: -2.294694969 + -1.125 = -3.419694969 x = -3.419694969 Simplifying x = -3.419694969

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.169694969, -3.419694969}

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