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Simplifying 11 + -4a = -7a(a + -1) + 1 Reorder the terms: 11 + -4a = -7a(-1 + a) + 1 11 + -4a = (-1 * -7a + a * -7a) + 1 11 + -4a = (7a + -7a2) + 1 Reorder the terms: 11 + -4a = 1 + 7a + -7a2 Solving 11 + -4a = 1 + 7a + -7a2 Solving for variable 'a'. Reorder the terms: 11 + -1 + -4a + -7a + 7a2 = 1 + 7a + -7a2 + -1 + -7a + 7a2 Combine like terms: 11 + -1 = 10 10 + -4a + -7a + 7a2 = 1 + 7a + -7a2 + -1 + -7a + 7a2 Combine like terms: -4a + -7a = -11a 10 + -11a + 7a2 = 1 + 7a + -7a2 + -1 + -7a + 7a2 Reorder the terms: 10 + -11a + 7a2 = 1 + -1 + 7a + -7a + -7a2 + 7a2 Combine like terms: 1 + -1 = 0 10 + -11a + 7a2 = 0 + 7a + -7a + -7a2 + 7a2 10 + -11a + 7a2 = 7a + -7a + -7a2 + 7a2 Combine like terms: 7a + -7a = 0 10 + -11a + 7a2 = 0 + -7a2 + 7a2 10 + -11a + 7a2 = -7a2 + 7a2 Combine like terms: -7a2 + 7a2 = 0 10 + -11a + 7a2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 1.428571429 + -1.571428571a + a2 = 0 Move the constant term to the right: Add '-1.428571429' to each side of the equation. 1.428571429 + -1.571428571a + -1.428571429 + a2 = 0 + -1.428571429 Reorder the terms: 1.428571429 + -1.428571429 + -1.571428571a + a2 = 0 + -1.428571429 Combine like terms: 1.428571429 + -1.428571429 = 0.000000000 0.000000000 + -1.571428571a + a2 = 0 + -1.428571429 -1.571428571a + a2 = 0 + -1.428571429 Combine like terms: 0 + -1.428571429 = -1.428571429 -1.571428571a + a2 = -1.428571429 The a term is -1.571428571a. Take half its coefficient (-0.7857142855). Square it (0.6173469384) and add it to both sides. Add '0.6173469384' to each side of the equation. -1.571428571a + 0.6173469384 + a2 = -1.428571429 + 0.6173469384 Reorder the terms: 0.6173469384 + -1.571428571a + a2 = -1.428571429 + 0.6173469384 Combine like terms: -1.428571429 + 0.6173469384 = -0.8112244906 0.6173469384 + -1.571428571a + a2 = -0.8112244906 Factor a perfect square on the left side: (a + -0.7857142855)(a + -0.7857142855) = -0.8112244906 Can't calculate square root of the right side. The solution to this equation could not be determined.
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