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Simplifying 7x2 + -19x + -8 = 0 Reorder the terms: -8 + -19x + 7x2 = 0 Solving -8 + -19x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -1.142857143 + -2.714285714x + x2 = 0 Move the constant term to the right: Add '1.142857143' to each side of the equation. -1.142857143 + -2.714285714x + 1.142857143 + x2 = 0 + 1.142857143 Reorder the terms: -1.142857143 + 1.142857143 + -2.714285714x + x2 = 0 + 1.142857143 Combine like terms: -1.142857143 + 1.142857143 = 0.000000000 0.000000000 + -2.714285714x + x2 = 0 + 1.142857143 -2.714285714x + x2 = 0 + 1.142857143 Combine like terms: 0 + 1.142857143 = 1.142857143 -2.714285714x + x2 = 1.142857143 The x term is -2.714285714x. Take half its coefficient (-1.357142857). Square it (1.841836734) and add it to both sides. Add '1.841836734' to each side of the equation. -2.714285714x + 1.841836734 + x2 = 1.142857143 + 1.841836734 Reorder the terms: 1.841836734 + -2.714285714x + x2 = 1.142857143 + 1.841836734 Combine like terms: 1.142857143 + 1.841836734 = 2.984693877 1.841836734 + -2.714285714x + x2 = 2.984693877 Factor a perfect square on the left side: (x + -1.357142857)(x + -1.357142857) = 2.984693877 Calculate the square root of the right side: 1.72762666 Break this problem into two subproblems by setting (x + -1.357142857) equal to 1.72762666 and -1.72762666.Subproblem 1
x + -1.357142857 = 1.72762666 Simplifying x + -1.357142857 = 1.72762666 Reorder the terms: -1.357142857 + x = 1.72762666 Solving -1.357142857 + x = 1.72762666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.357142857' to each side of the equation. -1.357142857 + 1.357142857 + x = 1.72762666 + 1.357142857 Combine like terms: -1.357142857 + 1.357142857 = 0.000000000 0.000000000 + x = 1.72762666 + 1.357142857 x = 1.72762666 + 1.357142857 Combine like terms: 1.72762666 + 1.357142857 = 3.084769517 x = 3.084769517 Simplifying x = 3.084769517Subproblem 2
x + -1.357142857 = -1.72762666 Simplifying x + -1.357142857 = -1.72762666 Reorder the terms: -1.357142857 + x = -1.72762666 Solving -1.357142857 + x = -1.72762666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.357142857' to each side of the equation. -1.357142857 + 1.357142857 + x = -1.72762666 + 1.357142857 Combine like terms: -1.357142857 + 1.357142857 = 0.000000000 0.000000000 + x = -1.72762666 + 1.357142857 x = -1.72762666 + 1.357142857 Combine like terms: -1.72762666 + 1.357142857 = -0.370483803 x = -0.370483803 Simplifying x = -0.370483803Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.084769517, -0.370483803}
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