5a-7a^2+9-8a+4a^2-12=

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Solution for 5a-7a^2+9-8a+4a^2-12= equation:


Simplifying
5a + -7a2 + 9 + -8a + 4a2 + -12 = 0

Reorder the terms:
9 + -12 + 5a + -8a + -7a2 + 4a2 = 0

Combine like terms: 9 + -12 = -3
-3 + 5a + -8a + -7a2 + 4a2 = 0

Combine like terms: 5a + -8a = -3a
-3 + -3a + -7a2 + 4a2 = 0

Combine like terms: -7a2 + 4a2 = -3a2
-3 + -3a + -3a2 = 0

Solving
-3 + -3a + -3a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '-3'.
-3(1 + a + a2) = 0

Ignore the factor -3.

Subproblem 1

Set the factor '(1 + a + a2)' equal to zero and attempt to solve: Simplifying 1 + a + a2 = 0 Solving 1 + a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + a + -1 + a2 = 0 + -1 Reorder the terms: 1 + -1 + a + a2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + a + a2 = 0 + -1 a + a2 = 0 + -1 Combine like terms: 0 + -1 = -1 a + a2 = -1 The a term is a. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. a + 0.25 + a2 = -1 + 0.25 Reorder the terms: 0.25 + a + a2 = -1 + 0.25 Combine like terms: -1 + 0.25 = -0.75 0.25 + a + a2 = -0.75 Factor a perfect square on the left side: (a + 0.5)(a + 0.5) = -0.75 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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