4a^2+8a-32=4

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Solution for 4a^2+8a-32=4 equation:


Simplifying
4a2 + 8a + -32 = 4

Reorder the terms:
-32 + 8a + 4a2 = 4

Solving
-32 + 8a + 4a2 = 4

Solving for variable 'a'.

Reorder the terms:
-32 + -4 + 8a + 4a2 = 4 + -4

Combine like terms: -32 + -4 = -36
-36 + 8a + 4a2 = 4 + -4

Combine like terms: 4 + -4 = 0
-36 + 8a + 4a2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-9 + 2a + a2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-9 + 2a + a2)' equal to zero and attempt to solve: Simplifying -9 + 2a + a2 = 0 Solving -9 + 2a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + 2a + 9 + a2 = 0 + 9 Reorder the terms: -9 + 9 + 2a + a2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 2a + a2 = 0 + 9 2a + a2 = 0 + 9 Combine like terms: 0 + 9 = 9 2a + a2 = 9 The a term is 2a. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2a + 1 + a2 = 9 + 1 Reorder the terms: 1 + 2a + a2 = 9 + 1 Combine like terms: 9 + 1 = 10 1 + 2a + a2 = 10 Factor a perfect square on the left side: (a + 1)(a + 1) = 10 Calculate the square root of the right side: 3.16227766 Break this problem into two subproblems by setting (a + 1) equal to 3.16227766 and -3.16227766.

Subproblem 1

a + 1 = 3.16227766 Simplifying a + 1 = 3.16227766 Reorder the terms: 1 + a = 3.16227766 Solving 1 + a = 3.16227766 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = 3.16227766 + -1 Combine like terms: 1 + -1 = 0 0 + a = 3.16227766 + -1 a = 3.16227766 + -1 Combine like terms: 3.16227766 + -1 = 2.16227766 a = 2.16227766 Simplifying a = 2.16227766

Subproblem 2

a + 1 = -3.16227766 Simplifying a + 1 = -3.16227766 Reorder the terms: 1 + a = -3.16227766 Solving 1 + a = -3.16227766 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = -3.16227766 + -1 Combine like terms: 1 + -1 = 0 0 + a = -3.16227766 + -1 a = -3.16227766 + -1 Combine like terms: -3.16227766 + -1 = -4.16227766 a = -4.16227766 Simplifying a = -4.16227766

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.16227766, -4.16227766}

Solution

a = {2.16227766, -4.16227766}

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