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Simplifying 4a2 + 4a = 20 Reorder the terms: 4a + 4a2 = 20 Solving 4a + 4a2 = 20 Solving for variable 'a'. Reorder the terms: -20 + 4a + 4a2 = 20 + -20 Combine like terms: 20 + -20 = 0 -20 + 4a + 4a2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(-5 + a + a2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(-5 + a + a2)' equal to zero and attempt to solve: Simplifying -5 + a + a2 = 0 Solving -5 + a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + a + 5 + a2 = 0 + 5 Reorder the terms: -5 + 5 + a + a2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + a + a2 = 0 + 5 a + a2 = 0 + 5 Combine like terms: 0 + 5 = 5 a + a2 = 5 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 = 5 + 0.25 Reorder the terms: 0.25 + a + a2 = 5 + 0.25 Combine like terms: 5 + 0.25 = 5.25 0.25 + a + a2 = 5.25 Factor a perfect square on the left side: (a + 0.5)(a + 0.5) = 5.25 Calculate the square root of the right side: 2.291287847 Break this problem into two subproblems by setting (a + 0.5) equal to 2.291287847 and -2.291287847.Subproblem 1
a + 0.5 = 2.291287847 Simplifying a + 0.5 = 2.291287847 Reorder the terms: 0.5 + a = 2.291287847 Solving 0.5 + a = 2.291287847 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = 2.291287847 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = 2.291287847 + -0.5 a = 2.291287847 + -0.5 Combine like terms: 2.291287847 + -0.5 = 1.791287847 a = 1.791287847 Simplifying a = 1.791287847Subproblem 2
a + 0.5 = -2.291287847 Simplifying a + 0.5 = -2.291287847 Reorder the terms: 0.5 + a = -2.291287847 Solving 0.5 + a = -2.291287847 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = -2.291287847 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = -2.291287847 + -0.5 a = -2.291287847 + -0.5 Combine like terms: -2.291287847 + -0.5 = -2.791287847 a = -2.791287847 Simplifying a = -2.791287847Solution
The solution to the problem is based on the solutions from the subproblems. a = {1.791287847, -2.791287847}Solution
a = {1.791287847, -2.791287847}
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