2x^2+1=(x+1)(x+2)

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Solution for 2x^2+1=(x+1)(x+2) equation:


Simplifying
2x2 + 1 = (x + 1)(x + 2)

Reorder the terms:
1 + 2x2 = (x + 1)(x + 2)

Reorder the terms:
1 + 2x2 = (1 + x)(x + 2)

Reorder the terms:
1 + 2x2 = (1 + x)(2 + x)

Multiply (1 + x) * (2 + x)
1 + 2x2 = (1(2 + x) + x(2 + x))
1 + 2x2 = ((2 * 1 + x * 1) + x(2 + x))
1 + 2x2 = ((2 + 1x) + x(2 + x))
1 + 2x2 = (2 + 1x + (2 * x + x * x))
1 + 2x2 = (2 + 1x + (2x + x2))

Combine like terms: 1x + 2x = 3x
1 + 2x2 = (2 + 3x + x2)

Solving
1 + 2x2 = 2 + 3x + x2

Solving for variable 'x'.

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

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

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

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

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

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

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

Begin completing the square.

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -3x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -3x + x2 = 0 + 1

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

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

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 = 1 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 1 + 2.25

Combine like terms: 1 + 2.25 = 3.25
2.25 + -3x + x2 = 3.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + -1.5 = 1.802775638 Simplifying x + -1.5 = 1.802775638 Reorder the terms: -1.5 + x = 1.802775638 Solving -1.5 + x = 1.802775638 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 = 1.802775638 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.802775638 + 1.5 x = 1.802775638 + 1.5 Combine like terms: 1.802775638 + 1.5 = 3.302775638 x = 3.302775638 Simplifying x = 3.302775638

Subproblem 2

x + -1.5 = -1.802775638 Simplifying x + -1.5 = -1.802775638 Reorder the terms: -1.5 + x = -1.802775638 Solving -1.5 + x = -1.802775638 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 = -1.802775638 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.802775638 + 1.5 x = -1.802775638 + 1.5 Combine like terms: -1.802775638 + 1.5 = -0.302775638 x = -0.302775638 Simplifying x = -0.302775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.302775638, -0.302775638}

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