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Simplifying x2 + -40x + 1040 = 0 Reorder the terms: 1040 + -40x + x2 = 0 Solving 1040 + -40x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-1040' to each side of the equation. 1040 + -40x + -1040 + x2 = 0 + -1040 Reorder the terms: 1040 + -1040 + -40x + x2 = 0 + -1040 Combine like terms: 1040 + -1040 = 0 0 + -40x + x2 = 0 + -1040 -40x + x2 = 0 + -1040 Combine like terms: 0 + -1040 = -1040 -40x + x2 = -1040 The x term is -40x. Take half its coefficient (-20). Square it (400) and add it to both sides. Add '400' to each side of the equation. -40x + 400 + x2 = -1040 + 400 Reorder the terms: 400 + -40x + x2 = -1040 + 400 Combine like terms: -1040 + 400 = -640 400 + -40x + x2 = -640 Factor a perfect square on the left side: (x + -20)(x + -20) = -640 Can't calculate square root of the right side. The solution to this equation could not be determined.
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