(3x+7)=(2x^2-3x+8)

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Solution for (3x+7)=(2x^2-3x+8) equation:


Simplifying
(3x + 7) = (2x2 + -3x + 8)

Reorder the terms:
(7 + 3x) = (2x2 + -3x + 8)

Remove parenthesis around (7 + 3x)
7 + 3x = (2x2 + -3x + 8)

Reorder the terms:
7 + 3x = (8 + -3x + 2x2)

Remove parenthesis around (8 + -3x + 2x2)
7 + 3x = 8 + -3x + 2x2

Solving
7 + 3x = 8 + -3x + 2x2

Solving for variable 'x'.

Reorder the terms:
7 + -8 + 3x + 3x + -2x2 = 8 + -3x + 2x2 + -8 + 3x + -2x2

Combine like terms: 7 + -8 = -1
-1 + 3x + 3x + -2x2 = 8 + -3x + 2x2 + -8 + 3x + -2x2

Combine like terms: 3x + 3x = 6x
-1 + 6x + -2x2 = 8 + -3x + 2x2 + -8 + 3x + -2x2

Reorder the terms:
-1 + 6x + -2x2 = 8 + -8 + -3x + 3x + 2x2 + -2x2

Combine like terms: 8 + -8 = 0
-1 + 6x + -2x2 = 0 + -3x + 3x + 2x2 + -2x2
-1 + 6x + -2x2 = -3x + 3x + 2x2 + -2x2

Combine like terms: -3x + 3x = 0
-1 + 6x + -2x2 = 0 + 2x2 + -2x2
-1 + 6x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-1 + 6x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
0.5 + -3x + x2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + -3x + -0.5 + x2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + -3x + x2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -3x + x2 = 0 + -0.5
-3x + x2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
-3x + x2 = -0.5

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 = -0.5 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -0.5 + 2.25

Combine like terms: -0.5 + 2.25 = 1.75
2.25 + -3x + x2 = 1.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.322875656 and -1.322875656.

Subproblem 1

x + -1.5 = 1.322875656 Simplifying x + -1.5 = 1.322875656 Reorder the terms: -1.5 + x = 1.322875656 Solving -1.5 + x = 1.322875656 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 = 1.322875656 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.322875656 + 1.5 x = 1.322875656 + 1.5 Combine like terms: 1.322875656 + 1.5 = 2.822875656 x = 2.822875656 Simplifying x = 2.822875656

Subproblem 2

x + -1.5 = -1.322875656 Simplifying x + -1.5 = -1.322875656 Reorder the terms: -1.5 + x = -1.322875656 Solving -1.5 + x = -1.322875656 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 = -1.322875656 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.322875656 + 1.5 x = -1.322875656 + 1.5 Combine like terms: -1.322875656 + 1.5 = 0.177124344 x = 0.177124344 Simplifying x = 0.177124344

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.822875656, 0.177124344}

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