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Simplifying (x + -4)(x + -4) = -7 Reorder the terms: (-4 + x)(x + -4) = -7 Reorder the terms: (-4 + x)(-4 + x) = -7 Multiply (-4 + x) * (-4 + x) (-4(-4 + x) + x(-4 + x)) = -7 ((-4 * -4 + x * -4) + x(-4 + x)) = -7 ((16 + -4x) + x(-4 + x)) = -7 (16 + -4x + (-4 * x + x * x)) = -7 (16 + -4x + (-4x + x2)) = -7 Combine like terms: -4x + -4x = -8x (16 + -8x + x2) = -7 Solving 16 + -8x + x2 = -7 Solving for variable 'x'. Reorder the terms: 16 + 7 + -8x + x2 = -7 + 7 Combine like terms: 16 + 7 = 23 23 + -8x + x2 = -7 + 7 Combine like terms: -7 + 7 = 0 23 + -8x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-23' to each side of the equation. 23 + -8x + -23 + x2 = 0 + -23 Reorder the terms: 23 + -23 + -8x + x2 = 0 + -23 Combine like terms: 23 + -23 = 0 0 + -8x + x2 = 0 + -23 -8x + x2 = 0 + -23 Combine like terms: 0 + -23 = -23 -8x + x2 = -23 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 = -23 + 16 Reorder the terms: 16 + -8x + x2 = -23 + 16 Combine like terms: -23 + 16 = -7 16 + -8x + x2 = -7 Factor a perfect square on the left side: (x + -4)(x + -4) = -7 Can't calculate square root of the right side. The solution to this equation could not be determined.
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