-1+5x(x-2)=12x+3-7x

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Solution for -1+5x(x-2)=12x+3-7x equation:


Simplifying
-1 + 5x(x + -2) = 12x + 3 + -7x

Reorder the terms:
-1 + 5x(-2 + x) = 12x + 3 + -7x
-1 + (-2 * 5x + x * 5x) = 12x + 3 + -7x
-1 + (-10x + 5x2) = 12x + 3 + -7x

Reorder the terms:
-1 + -10x + 5x2 = 3 + 12x + -7x

Combine like terms: 12x + -7x = 5x
-1 + -10x + 5x2 = 3 + 5x

Solving
-1 + -10x + 5x2 = 3 + 5x

Solving for variable 'x'.

Reorder the terms:
-1 + -3 + -10x + -5x + 5x2 = 3 + 5x + -3 + -5x

Combine like terms: -1 + -3 = -4
-4 + -10x + -5x + 5x2 = 3 + 5x + -3 + -5x

Combine like terms: -10x + -5x = -15x
-4 + -15x + 5x2 = 3 + 5x + -3 + -5x

Reorder the terms:
-4 + -15x + 5x2 = 3 + -3 + 5x + -5x

Combine like terms: 3 + -3 = 0
-4 + -15x + 5x2 = 0 + 5x + -5x
-4 + -15x + 5x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-4 + -15x + 5x2 = 0

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

Divide each side by '5'.
-0.8 + -3x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -3x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -3x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -3x + x2 = 0 + 0.8
-3x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-3x + x2 = 0.8

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 0.8 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 0.8 + 2.25

Combine like terms: 0.8 + 2.25 = 3.05
2.25 + -3x + x2 = 3.05

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 3.05

Calculate the square root of the right side: 1.74642492

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.74642492 and -1.74642492.

Subproblem 1

x + -1.5 = 1.74642492 Simplifying x + -1.5 = 1.74642492 Reorder the terms: -1.5 + x = 1.74642492 Solving -1.5 + x = 1.74642492 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.74642492 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.74642492 + 1.5 x = 1.74642492 + 1.5 Combine like terms: 1.74642492 + 1.5 = 3.24642492 x = 3.24642492 Simplifying x = 3.24642492

Subproblem 2

x + -1.5 = -1.74642492 Simplifying x + -1.5 = -1.74642492 Reorder the terms: -1.5 + x = -1.74642492 Solving -1.5 + x = -1.74642492 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.74642492 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.74642492 + 1.5 x = -1.74642492 + 1.5 Combine like terms: -1.74642492 + 1.5 = -0.24642492 x = -0.24642492 Simplifying x = -0.24642492

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.24642492, -0.24642492}

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