0=x^2+3x+8

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Solution for 0=x^2+3x+8 equation:


Simplifying
0 = x2 + 3x + 8

Reorder the terms:
0 = 8 + 3x + x2

Solving
0 = 8 + 3x + x2

Solving for variable 'x'.

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

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

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

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

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

Factor out the Greatest Common Factor (GCF), '-1'.
-1(8 + 3x + x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(8 + 3x + x2)' equal to zero and attempt to solve: Simplifying 8 + 3x + x2 = 0 Solving 8 + 3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + 3x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + 3x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 3x + x2 = 0 + -8 3x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 3x + x2 = -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 = -8 + 2.25 Reorder the terms: 2.25 + 3x + x2 = -8 + 2.25 Combine like terms: -8 + 2.25 = -5.75 2.25 + 3x + x2 = -5.75 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = -5.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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