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Simplifying 21x2 + -168x + 16000 = 0 Reorder the terms: 16000 + -168x + 21x2 = 0 Solving 16000 + -168x + 21x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 21 the coefficient of the squared term: Divide each side by '21'. 761.9047619 + -8x + x2 = 0 Move the constant term to the right: Add '-761.9047619' to each side of the equation. 761.9047619 + -8x + -761.9047619 + x2 = 0 + -761.9047619 Reorder the terms: 761.9047619 + -761.9047619 + -8x + x2 = 0 + -761.9047619 Combine like terms: 761.9047619 + -761.9047619 = 0.0000000 0.0000000 + -8x + x2 = 0 + -761.9047619 -8x + x2 = 0 + -761.9047619 Combine like terms: 0 + -761.9047619 = -761.9047619 -8x + x2 = -761.9047619 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -761.9047619 + 16 Reorder the terms: 16 + -8x + x2 = -761.9047619 + 16 Combine like terms: -761.9047619 + 16 = -745.9047619 16 + -8x + x2 = -745.9047619 Factor a perfect square on the left side: (x + -4)(x + -4) = -745.9047619 Can't calculate square root of the right side. The solution to this equation could not be determined.
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