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Simplifying x2 + -40x + 850 = 0 Reorder the terms: 850 + -40x + x2 = 0 Solving 850 + -40x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-850' to each side of the equation. 850 + -40x + -850 + x2 = 0 + -850 Reorder the terms: 850 + -850 + -40x + x2 = 0 + -850 Combine like terms: 850 + -850 = 0 0 + -40x + x2 = 0 + -850 -40x + x2 = 0 + -850 Combine like terms: 0 + -850 = -850 -40x + x2 = -850 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 = -850 + 400 Reorder the terms: 400 + -40x + x2 = -850 + 400 Combine like terms: -850 + 400 = -450 400 + -40x + x2 = -450 Factor a perfect square on the left side: (x + -20)(x + -20) = -450 Can't calculate square root of the right side. The solution to this equation could not be determined.
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