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Simplifying (x + -4)(x + 4) + 8 = 0 Reorder the terms: (-4 + x)(x + 4) + 8 = 0 Reorder the terms: (-4 + x)(4 + x) + 8 = 0 Multiply (-4 + x) * (4 + x) (-4(4 + x) + x(4 + x)) + 8 = 0 ((4 * -4 + x * -4) + x(4 + x)) + 8 = 0 ((-16 + -4x) + x(4 + x)) + 8 = 0 (-16 + -4x + (4 * x + x * x)) + 8 = 0 (-16 + -4x + (4x + x2)) + 8 = 0 Combine like terms: -4x + 4x = 0 (-16 + 0 + x2) + 8 = 0 (-16 + x2) + 8 = 0 Reorder the terms: -16 + 8 + x2 = 0 Combine like terms: -16 + 8 = -8 -8 + x2 = 0 Solving -8 + x2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + x2 = 0 + 8 x2 = 0 + 8 Combine like terms: 0 + 8 = 8 x2 = 8 Simplifying x2 = 8 Take the square root of each side: x = {-2.828427125, 2.828427125}
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