4x^2+12x+15=5

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Solution for 4x^2+12x+15=5 equation:


Simplifying
4x2 + 12x + 15 = 5

Reorder the terms:
15 + 12x + 4x2 = 5

Solving
15 + 12x + 4x2 = 5

Solving for variable 'x'.

Reorder the terms:
15 + -5 + 12x + 4x2 = 5 + -5

Combine like terms: 15 + -5 = 10
10 + 12x + 4x2 = 5 + -5

Combine like terms: 5 + -5 = 0
10 + 12x + 4x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(5 + 6x + 2x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(5 + 6x + 2x2)' equal to zero and attempt to solve: Simplifying 5 + 6x + 2x2 = 0 Solving 5 + 6x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 2.5 + 3x + x2 = 0 Move the constant term to the right: Add '-2.5' to each side of the equation. 2.5 + 3x + -2.5 + x2 = 0 + -2.5 Reorder the terms: 2.5 + -2.5 + 3x + x2 = 0 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + 3x + x2 = 0 + -2.5 3x + x2 = 0 + -2.5 Combine like terms: 0 + -2.5 = -2.5 3x + x2 = -2.5 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 = -2.5 + 2.25 Reorder the terms: 2.25 + 3x + x2 = -2.5 + 2.25 Combine like terms: -2.5 + 2.25 = -0.25 2.25 + 3x + x2 = -0.25 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = -0.25 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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