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Simplifying x2 + -160x + 7800 = 0 Reorder the terms: 7800 + -160x + x2 = 0 Solving 7800 + -160x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-7800' to each side of the equation. 7800 + -160x + -7800 + x2 = 0 + -7800 Reorder the terms: 7800 + -7800 + -160x + x2 = 0 + -7800 Combine like terms: 7800 + -7800 = 0 0 + -160x + x2 = 0 + -7800 -160x + x2 = 0 + -7800 Combine like terms: 0 + -7800 = -7800 -160x + x2 = -7800 The x term is -160x. Take half its coefficient (-80). Square it (6400) and add it to both sides. Add '6400' to each side of the equation. -160x + 6400 + x2 = -7800 + 6400 Reorder the terms: 6400 + -160x + x2 = -7800 + 6400 Combine like terms: -7800 + 6400 = -1400 6400 + -160x + x2 = -1400 Factor a perfect square on the left side: (x + -80)(x + -80) = -1400 Can't calculate square root of the right side. The solution to this equation could not be determined.
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