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Simplifying 7 + -3x(x + -2) + x = 4 Reorder the terms: 7 + -3x(-2 + x) + x = 4 7 + (-2 * -3x + x * -3x) + x = 4 7 + (6x + -3x2) + x = 4 Reorder the terms: 7 + 6x + x + -3x2 = 4 Combine like terms: 6x + x = 7x 7 + 7x + -3x2 = 4 Solving 7 + 7x + -3x2 = 4 Solving for variable 'x'. Reorder the terms: 7 + -4 + 7x + -3x2 = 4 + -4 Combine like terms: 7 + -4 = 3 3 + 7x + -3x2 = 4 + -4 Combine like terms: 4 + -4 = 0 3 + 7x + -3x2 = 0 Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. -1 + -2.333333333x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -2.333333333x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -2.333333333x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -2.333333333x + x2 = 0 + 1 -2.333333333x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -2.333333333x + x2 = 1 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 = 1 + 1.361111112 Reorder the terms: 1.361111112 + -2.333333333x + x2 = 1 + 1.361111112 Combine like terms: 1 + 1.361111112 = 2.361111112 1.361111112 + -2.333333333x + x2 = 2.361111112 Factor a perfect square on the left side: (x + -1.166666667)(x + -1.166666667) = 2.361111112 Calculate the square root of the right side: 1.536590743 Break this problem into two subproblems by setting (x + -1.166666667) equal to 1.536590743 and -1.536590743.Subproblem 1
x + -1.166666667 = 1.536590743 Simplifying x + -1.166666667 = 1.536590743 Reorder the terms: -1.166666667 + x = 1.536590743 Solving -1.166666667 + x = 1.536590743 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 = 1.536590743 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x = 1.536590743 + 1.166666667 x = 1.536590743 + 1.166666667 Combine like terms: 1.536590743 + 1.166666667 = 2.70325741 x = 2.70325741 Simplifying x = 2.70325741Subproblem 2
x + -1.166666667 = -1.536590743 Simplifying x + -1.166666667 = -1.536590743 Reorder the terms: -1.166666667 + x = -1.536590743 Solving -1.166666667 + x = -1.536590743 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 = -1.536590743 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x = -1.536590743 + 1.166666667 x = -1.536590743 + 1.166666667 Combine like terms: -1.536590743 + 1.166666667 = -0.369924076 x = -0.369924076 Simplifying x = -0.369924076Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.70325741, -0.369924076}
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