3x^2+8x-19=x^2+1

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Solution for 3x^2+8x-19=x^2+1 equation:


Simplifying
3x2 + 8x + -19 = x2 + 1

Reorder the terms:
-19 + 8x + 3x2 = x2 + 1

Reorder the terms:
-19 + 8x + 3x2 = 1 + x2

Solving
-19 + 8x + 3x2 = 1 + x2

Solving for variable 'x'.

Reorder the terms:
-19 + -1 + 8x + 3x2 + -1x2 = 1 + x2 + -1 + -1x2

Combine like terms: -19 + -1 = -20
-20 + 8x + 3x2 + -1x2 = 1 + x2 + -1 + -1x2

Combine like terms: 3x2 + -1x2 = 2x2
-20 + 8x + 2x2 = 1 + x2 + -1 + -1x2

Reorder the terms:
-20 + 8x + 2x2 = 1 + -1 + x2 + -1x2

Combine like terms: 1 + -1 = 0
-20 + 8x + 2x2 = 0 + x2 + -1x2
-20 + 8x + 2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-20 + 8x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-10 + 4x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-10 + 4x + x2)' equal to zero and attempt to solve: Simplifying -10 + 4x + x2 = 0 Solving -10 + 4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '10' to each side of the equation. -10 + 4x + 10 + x2 = 0 + 10 Reorder the terms: -10 + 10 + 4x + x2 = 0 + 10 Combine like terms: -10 + 10 = 0 0 + 4x + x2 = 0 + 10 4x + x2 = 0 + 10 Combine like terms: 0 + 10 = 10 4x + x2 = 10 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = 10 + 4 Reorder the terms: 4 + 4x + x2 = 10 + 4 Combine like terms: 10 + 4 = 14 4 + 4x + x2 = 14 Factor a perfect square on the left side: (x + 2)(x + 2) = 14 Calculate the square root of the right side: 3.741657387 Break this problem into two subproblems by setting (x + 2) equal to 3.741657387 and -3.741657387.

Subproblem 1

x + 2 = 3.741657387 Simplifying x + 2 = 3.741657387 Reorder the terms: 2 + x = 3.741657387 Solving 2 + x = 3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 3.741657387 + -2 Combine like terms: 2 + -2 = 0 0 + x = 3.741657387 + -2 x = 3.741657387 + -2 Combine like terms: 3.741657387 + -2 = 1.741657387 x = 1.741657387 Simplifying x = 1.741657387

Subproblem 2

x + 2 = -3.741657387 Simplifying x + 2 = -3.741657387 Reorder the terms: 2 + x = -3.741657387 Solving 2 + x = -3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -3.741657387 + -2 Combine like terms: 2 + -2 = 0 0 + x = -3.741657387 + -2 x = -3.741657387 + -2 Combine like terms: -3.741657387 + -2 = -5.741657387 x = -5.741657387 Simplifying x = -5.741657387

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.741657387, -5.741657387}

Solution

x = {1.741657387, -5.741657387}

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