8x^2+10x+40=0

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Solution for 8x^2+10x+40=0 equation:


Simplifying
8x2 + 10x + 40 = 0

Reorder the terms:
40 + 10x + 8x2 = 0

Solving
40 + 10x + 8x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(20 + 5x + 4x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(20 + 5x + 4x2)' equal to zero and attempt to solve: Simplifying 20 + 5x + 4x2 = 0 Solving 20 + 5x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 5 + 1.25x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + 1.25x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 1.25x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 1.25x + x2 = 0 + -5 1.25x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 1.25x + x2 = -5 The x term is 1.25x. Take half its coefficient (0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. 1.25x + 0.390625 + x2 = -5 + 0.390625 Reorder the terms: 0.390625 + 1.25x + x2 = -5 + 0.390625 Combine like terms: -5 + 0.390625 = -4.609375 0.390625 + 1.25x + x2 = -4.609375 Factor a perfect square on the left side: (x + 0.625)(x + 0.625) = -4.609375 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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