-4x^2-9x-8=0

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Solution for -4x^2-9x-8=0 equation:


Simplifying
-4x2 + -9x + -8 = 0

Reorder the terms:
-8 + -9x + -4x2 = 0

Solving
-8 + -9x + -4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(8 + 9x + 4x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(8 + 9x + 4x2)' equal to zero and attempt to solve: Simplifying 8 + 9x + 4x2 = 0 Solving 8 + 9x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 2 + 2.25x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + 2.25x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + 2.25x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 2.25x + x2 = 0 + -2 2.25x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 2.25x + x2 = -2 The x term is 2.25x. Take half its coefficient (1.125). Square it (1.265625) and add it to both sides. Add '1.265625' to each side of the equation. 2.25x + 1.265625 + x2 = -2 + 1.265625 Reorder the terms: 1.265625 + 2.25x + x2 = -2 + 1.265625 Combine like terms: -2 + 1.265625 = -0.734375 1.265625 + 2.25x + x2 = -0.734375 Factor a perfect square on the left side: (x + 1.125)(x + 1.125) = -0.734375 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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