x=4x^2-5x+8

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Solution for x=4x^2-5x+8 equation:


Simplifying
x = 4x2 + -5x + 8

Reorder the terms:
x = 8 + -5x + 4x2

Solving
x = 8 + -5x + 4x2

Solving for variable 'x'.

Reorder the terms:
-8 + x + 5x + -4x2 = 8 + -5x + 4x2 + -8 + 5x + -4x2

Combine like terms: x + 5x = 6x
-8 + 6x + -4x2 = 8 + -5x + 4x2 + -8 + 5x + -4x2

Reorder the terms:
-8 + 6x + -4x2 = 8 + -8 + -5x + 5x + 4x2 + -4x2

Combine like terms: 8 + -8 = 0
-8 + 6x + -4x2 = 0 + -5x + 5x + 4x2 + -4x2
-8 + 6x + -4x2 = -5x + 5x + 4x2 + -4x2

Combine like terms: -5x + 5x = 0
-8 + 6x + -4x2 = 0 + 4x2 + -4x2
-8 + 6x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-8 + 6x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-4 + 3x + -2x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-4 + 3x + -2x2)' equal to zero and attempt to solve: Simplifying -4 + 3x + -2x2 = 0 Solving -4 + 3x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 2 + -1.5x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + -1.5x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + -1.5x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1.5x + x2 = 0 + -2 -1.5x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 -1.5x + x2 = -2 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = -2 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = -2 + 0.5625 Combine like terms: -2 + 0.5625 = -1.4375 0.5625 + -1.5x + x2 = -1.4375 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = -1.4375 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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