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Simplifying 21x2 + -8x + 63 = 0 Reorder the terms: 63 + -8x + 21x2 = 0 Solving 63 + -8x + 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'. 3 + -0.380952381x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -0.380952381x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -0.380952381x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -0.380952381x + x2 = 0 + -3 -0.380952381x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -0.380952381x + x2 = -3 The x term is -0.380952381x. Take half its coefficient (-0.1904761905). Square it (0.03628117915) and add it to both sides. Add '0.03628117915' to each side of the equation. -0.380952381x + 0.03628117915 + x2 = -3 + 0.03628117915 Reorder the terms: 0.03628117915 + -0.380952381x + x2 = -3 + 0.03628117915 Combine like terms: -3 + 0.03628117915 = -2.96371882085 0.03628117915 + -0.380952381x + x2 = -2.96371882085 Factor a perfect square on the left side: (x + -0.1904761905)(x + -0.1904761905) = -2.96371882085 Can't calculate square root of the right side. The solution to this equation could not be determined.
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