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Simplifying x2 + -16x + 84 = 0 Reorder the terms: 84 + -16x + x2 = 0 Solving 84 + -16x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-84' to each side of the equation. 84 + -16x + -84 + x2 = 0 + -84 Reorder the terms: 84 + -84 + -16x + x2 = 0 + -84 Combine like terms: 84 + -84 = 0 0 + -16x + x2 = 0 + -84 -16x + x2 = 0 + -84 Combine like terms: 0 + -84 = -84 -16x + x2 = -84 The x term is -16x. Take half its coefficient (-8). Square it (64) and add it to both sides. Add '64' to each side of the equation. -16x + 64 + x2 = -84 + 64 Reorder the terms: 64 + -16x + x2 = -84 + 64 Combine like terms: -84 + 64 = -20 64 + -16x + x2 = -20 Factor a perfect square on the left side: (x + -8)(x + -8) = -20 Can't calculate square root of the right side. The solution to this equation could not be determined.
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