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Simplifying 8x + -1x * x = 30 Multiply x * x 8x + -1x2 = 30 Solving 8x + -1x2 = 30 Solving for variable 'x'. Reorder the terms: -30 + 8x + -1x2 = 30 + -30 Combine like terms: 30 + -30 = 0 -30 + 8x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 30 + -8x + x2 = 0 Move the constant term to the right: Add '-30' to each side of the equation. 30 + -8x + -30 + x2 = 0 + -30 Reorder the terms: 30 + -30 + -8x + x2 = 0 + -30 Combine like terms: 30 + -30 = 0 0 + -8x + x2 = 0 + -30 -8x + x2 = 0 + -30 Combine like terms: 0 + -30 = -30 -8x + x2 = -30 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 = -30 + 16 Reorder the terms: 16 + -8x + x2 = -30 + 16 Combine like terms: -30 + 16 = -14 16 + -8x + x2 = -14 Factor a perfect square on the left side: (x + -4)(x + -4) = -14 Can't calculate square root of the right side. The solution to this equation could not be determined.
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