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Simplifying x2 + 12x = -47 Reorder the terms: 12x + x2 = -47 Solving 12x + x2 = -47 Solving for variable 'x'. Reorder the terms: 47 + 12x + x2 = -47 + 47 Combine like terms: -47 + 47 = 0 47 + 12x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-47' to each side of the equation. 47 + 12x + -47 + x2 = 0 + -47 Reorder the terms: 47 + -47 + 12x + x2 = 0 + -47 Combine like terms: 47 + -47 = 0 0 + 12x + x2 = 0 + -47 12x + x2 = 0 + -47 Combine like terms: 0 + -47 = -47 12x + x2 = -47 The x term is 12x. Take half its coefficient (6). Square it (36) and add it to both sides. Add '36' to each side of the equation. 12x + 36 + x2 = -47 + 36 Reorder the terms: 36 + 12x + x2 = -47 + 36 Combine like terms: -47 + 36 = -11 36 + 12x + x2 = -11 Factor a perfect square on the left side: (x + 6)(x + 6) = -11 Can't calculate square root of the right side. The solution to this equation could not be determined.
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