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Simplifying 7 = -1x2 + -4x Reorder the terms: 7 = -4x + -1x2 Solving 7 = -4x + -1x2 Solving for variable 'x'. Reorder the terms: 7 + 4x + x2 = -4x + 4x + -1x2 + x2 Combine like terms: -4x + 4x = 0 7 + 4x + x2 = 0 + -1x2 + x2 7 + 4x + x2 = -1x2 + x2 Combine like terms: -1x2 + x2 = 0 7 + 4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-7' to each side of the equation. 7 + 4x + -7 + x2 = 0 + -7 Reorder the terms: 7 + -7 + 4x + x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 4x + x2 = 0 + -7 4x + x2 = 0 + -7 Combine like terms: 0 + -7 = -7 4x + x2 = -7 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = -7 + 4 Reorder the terms: 4 + 4x + x2 = -7 + 4 Combine like terms: -7 + 4 = -3 4 + 4x + x2 = -3 Factor a perfect square on the left side: (x + 2)(x + 2) = -3 Can't calculate square root of the right side. The solution to this equation could not be determined.
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