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Simplifying 5a2 + -3a + -9 = 0 Reorder the terms: -9 + -3a + 5a2 = 0 Solving -9 + -3a + 5a2 = 0 Solving for variable 'a'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -1.8 + -0.6a + a2 = 0 Move the constant term to the right: Add '1.8' to each side of the equation. -1.8 + -0.6a + 1.8 + a2 = 0 + 1.8 Reorder the terms: -1.8 + 1.8 + -0.6a + a2 = 0 + 1.8 Combine like terms: -1.8 + 1.8 = 0.0 0.0 + -0.6a + a2 = 0 + 1.8 -0.6a + a2 = 0 + 1.8 Combine like terms: 0 + 1.8 = 1.8 -0.6a + a2 = 1.8 The a term is -0.6a. Take half its coefficient (-0.3). Square it (0.09) and add it to both sides. Add '0.09' to each side of the equation. -0.6a + 0.09 + a2 = 1.8 + 0.09 Reorder the terms: 0.09 + -0.6a + a2 = 1.8 + 0.09 Combine like terms: 1.8 + 0.09 = 1.89 0.09 + -0.6a + a2 = 1.89 Factor a perfect square on the left side: (a + -0.3)(a + -0.3) = 1.89 Calculate the square root of the right side: 1.374772708 Break this problem into two subproblems by setting (a + -0.3) equal to 1.374772708 and -1.374772708.Subproblem 1
a + -0.3 = 1.374772708 Simplifying a + -0.3 = 1.374772708 Reorder the terms: -0.3 + a = 1.374772708 Solving -0.3 + a = 1.374772708 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + a = 1.374772708 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + a = 1.374772708 + 0.3 a = 1.374772708 + 0.3 Combine like terms: 1.374772708 + 0.3 = 1.674772708 a = 1.674772708 Simplifying a = 1.674772708Subproblem 2
a + -0.3 = -1.374772708 Simplifying a + -0.3 = -1.374772708 Reorder the terms: -0.3 + a = -1.374772708 Solving -0.3 + a = -1.374772708 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + a = -1.374772708 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + a = -1.374772708 + 0.3 a = -1.374772708 + 0.3 Combine like terms: -1.374772708 + 0.3 = -1.074772708 a = -1.074772708 Simplifying a = -1.074772708Solution
The solution to the problem is based on the solutions from the subproblems. a = {1.674772708, -1.074772708}
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