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Simplifying 6x2 + 14x + -15 = 0 Reorder the terms: -15 + 14x + 6x2 = 0 Solving -15 + 14x + 6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -2.5 + 2.333333333x + x2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + 2.333333333x + 2.5 + x2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + 2.333333333x + x2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + 2.333333333x + x2 = 0 + 2.5 2.333333333x + x2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 2.333333333x + x2 = 2.5 The x term is 2.333333333x. Take half its coefficient (1.166666667). Square it (1.361111112) and add it to both sides. Add '1.361111112' to each side of the equation. 2.333333333x + 1.361111112 + x2 = 2.5 + 1.361111112 Reorder the terms: 1.361111112 + 2.333333333x + x2 = 2.5 + 1.361111112 Combine like terms: 2.5 + 1.361111112 = 3.861111112 1.361111112 + 2.333333333x + x2 = 3.861111112 Factor a perfect square on the left side: (x + 1.166666667)(x + 1.166666667) = 3.861111112 Calculate the square root of the right side: 1.964971021 Break this problem into two subproblems by setting (x + 1.166666667) equal to 1.964971021 and -1.964971021.Subproblem 1
x + 1.166666667 = 1.964971021 Simplifying x + 1.166666667 = 1.964971021 Reorder the terms: 1.166666667 + x = 1.964971021 Solving 1.166666667 + x = 1.964971021 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = 1.964971021 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = 1.964971021 + -1.166666667 x = 1.964971021 + -1.166666667 Combine like terms: 1.964971021 + -1.166666667 = 0.798304354 x = 0.798304354 Simplifying x = 0.798304354Subproblem 2
x + 1.166666667 = -1.964971021 Simplifying x + 1.166666667 = -1.964971021 Reorder the terms: 1.166666667 + x = -1.964971021 Solving 1.166666667 + x = -1.964971021 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = -1.964971021 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = -1.964971021 + -1.166666667 x = -1.964971021 + -1.166666667 Combine like terms: -1.964971021 + -1.166666667 = -3.131637688 x = -3.131637688 Simplifying x = -3.131637688Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.798304354, -3.131637688}
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