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Simplifying 7x + -9x * 10x = 17 Reorder the terms for easier multiplication: 7x + -9 * 10x * x = 17 Multiply -9 * 10 7x + -90x * x = 17 Multiply x * x 7x + -90x2 = 17 Solving 7x + -90x2 = 17 Solving for variable 'x'. Reorder the terms: -17 + 7x + -90x2 = 17 + -17 Combine like terms: 17 + -17 = 0 -17 + 7x + -90x2 = 0 Begin completing the square. Divide all terms by -90 the coefficient of the squared term: Divide each side by '-90'. 0.1888888889 + -0.07777777778x + x2 = 0.0 Move the constant term to the right: Add '-0.1888888889' to each side of the equation. 0.1888888889 + -0.07777777778x + -0.1888888889 + x2 = 0.0 + -0.1888888889 Reorder the terms: 0.1888888889 + -0.1888888889 + -0.07777777778x + x2 = 0.0 + -0.1888888889 Combine like terms: 0.1888888889 + -0.1888888889 = 0.0000000000 0.0000000000 + -0.07777777778x + x2 = 0.0 + -0.1888888889 -0.07777777778x + x2 = 0.0 + -0.1888888889 Combine like terms: 0.0 + -0.1888888889 = -0.1888888889 -0.07777777778x + x2 = -0.1888888889 The x term is -0.07777777778x. Take half its coefficient (-0.03888888889). Square it (0.001512345679) and add it to both sides. Add '0.001512345679' to each side of the equation. -0.07777777778x + 0.001512345679 + x2 = -0.1888888889 + 0.001512345679 Reorder the terms: 0.001512345679 + -0.07777777778x + x2 = -0.1888888889 + 0.001512345679 Combine like terms: -0.1888888889 + 0.001512345679 = -0.187376543221 0.001512345679 + -0.07777777778x + x2 = -0.187376543221 Factor a perfect square on the left side: (x + -0.03888888889)(x + -0.03888888889) = -0.187376543221 Can't calculate square root of the right side. The solution to this equation could not be determined.
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