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Simplifying 7x2 + -25x + 28 = 0 Reorder the terms: 28 + -25x + 7x2 = 0 Solving 28 + -25x + 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'. 4 + -3.571428571x + x2 = 0 Move the constant term to the right: Add '-4' to each side of the equation. 4 + -3.571428571x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + -3.571428571x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -3.571428571x + x2 = 0 + -4 -3.571428571x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 -3.571428571x + x2 = -4 The x term is -3.571428571x. Take half its coefficient (-1.785714286). Square it (3.188775511) and add it to both sides. Add '3.188775511' to each side of the equation. -3.571428571x + 3.188775511 + x2 = -4 + 3.188775511 Reorder the terms: 3.188775511 + -3.571428571x + x2 = -4 + 3.188775511 Combine like terms: -4 + 3.188775511 = -0.811224489 3.188775511 + -3.571428571x + x2 = -0.811224489 Factor a perfect square on the left side: (x + -1.785714286)(x + -1.785714286) = -0.811224489 Can't calculate square root of the right side. The solution to this equation could not be determined.
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