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Simplifying 5(a + 3) = 3 * 1 + -1a * a Reorder the terms: 5(3 + a) = 3 * 1 + -1a * a (3 * 5 + a * 5) = 3 * 1 + -1a * a (15 + 5a) = 3 * 1 + -1a * a Multiply 3 * 1 15 + 5a = 3 + -1a * a Multiply a * a 15 + 5a = 3 + -1a2 Solving 15 + 5a = 3 + -1a2 Solving for variable 'a'. Reorder the terms: 15 + -3 + 5a + a2 = 3 + -1a2 + -3 + a2 Combine like terms: 15 + -3 = 12 12 + 5a + a2 = 3 + -1a2 + -3 + a2 Reorder the terms: 12 + 5a + a2 = 3 + -3 + -1a2 + a2 Combine like terms: 3 + -3 = 0 12 + 5a + a2 = 0 + -1a2 + a2 12 + 5a + a2 = -1a2 + a2 Combine like terms: -1a2 + a2 = 0 12 + 5a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '-12' to each side of the equation. 12 + 5a + -12 + a2 = 0 + -12 Reorder the terms: 12 + -12 + 5a + a2 = 0 + -12 Combine like terms: 12 + -12 = 0 0 + 5a + a2 = 0 + -12 5a + a2 = 0 + -12 Combine like terms: 0 + -12 = -12 5a + a2 = -12 The a term is 5a. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5a + 6.25 + a2 = -12 + 6.25 Reorder the terms: 6.25 + 5a + a2 = -12 + 6.25 Combine like terms: -12 + 6.25 = -5.75 6.25 + 5a + a2 = -5.75 Factor a perfect square on the left side: (a + 2.5)(a + 2.5) = -5.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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