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Simplifying 3x2 + 10x + -12 = 0 Reorder the terms: -12 + 10x + 3x2 = 0 Solving -12 + 10x + 3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -4 + 3.333333333x + x2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + 3.333333333x + 4 + x2 = 0 + 4 Reorder the terms: -4 + 4 + 3.333333333x + x2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 3.333333333x + x2 = 0 + 4 3.333333333x + x2 = 0 + 4 Combine like terms: 0 + 4 = 4 3.333333333x + x2 = 4 The x term is 3.333333333x. Take half its coefficient (1.666666667). Square it (2.777777779) and add it to both sides. Add '2.777777779' to each side of the equation. 3.333333333x + 2.777777779 + x2 = 4 + 2.777777779 Reorder the terms: 2.777777779 + 3.333333333x + x2 = 4 + 2.777777779 Combine like terms: 4 + 2.777777779 = 6.777777779 2.777777779 + 3.333333333x + x2 = 6.777777779 Factor a perfect square on the left side: (x + 1.666666667)(x + 1.666666667) = 6.777777779 Calculate the square root of the right side: 2.603416559 Break this problem into two subproblems by setting (x + 1.666666667) equal to 2.603416559 and -2.603416559.Subproblem 1
x + 1.666666667 = 2.603416559 Simplifying x + 1.666666667 = 2.603416559 Reorder the terms: 1.666666667 + x = 2.603416559 Solving 1.666666667 + x = 2.603416559 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = 2.603416559 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = 2.603416559 + -1.666666667 x = 2.603416559 + -1.666666667 Combine like terms: 2.603416559 + -1.666666667 = 0.936749892 x = 0.936749892 Simplifying x = 0.936749892Subproblem 2
x + 1.666666667 = -2.603416559 Simplifying x + 1.666666667 = -2.603416559 Reorder the terms: 1.666666667 + x = -2.603416559 Solving 1.666666667 + x = -2.603416559 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = -2.603416559 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = -2.603416559 + -1.666666667 x = -2.603416559 + -1.666666667 Combine like terms: -2.603416559 + -1.666666667 = -4.270083226 x = -4.270083226 Simplifying x = -4.270083226Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.936749892, -4.270083226}
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