4-2y-y^2=12

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Solution for 4-2y-y^2=12 equation:


Simplifying
4 + -2y + -1y2 = 12

Solving
4 + -2y + -1y2 = 12

Solving for variable 'y'.

Reorder the terms:
4 + -12 + -2y + -1y2 = 12 + -12

Combine like terms: 4 + -12 = -8
-8 + -2y + -1y2 = 12 + -12

Combine like terms: 12 + -12 = 0
-8 + -2y + -1y2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(8 + 2y + y2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(8 + 2y + y2)' equal to zero and attempt to solve: Simplifying 8 + 2y + y2 = 0 Solving 8 + 2y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + 2y + -8 + y2 = 0 + -8 Reorder the terms: 8 + -8 + 2y + y2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 2y + y2 = 0 + -8 2y + y2 = 0 + -8 Combine like terms: 0 + -8 = -8 2y + y2 = -8 The y term is 2y. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2y + 1 + y2 = -8 + 1 Reorder the terms: 1 + 2y + y2 = -8 + 1 Combine like terms: -8 + 1 = -7 1 + 2y + y2 = -7 Factor a perfect square on the left side: (y + 1)(y + 1) = -7 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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