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Simplifying X2 + 4X + 140 = 0 Reorder the terms: 140 + 4X + X2 = 0 Solving 140 + 4X + X2 = 0 Solving for variable 'X'. Begin completing the square. Move the constant term to the right: Add '-140' to each side of the equation. 140 + 4X + -140 + X2 = 0 + -140 Reorder the terms: 140 + -140 + 4X + X2 = 0 + -140 Combine like terms: 140 + -140 = 0 0 + 4X + X2 = 0 + -140 4X + X2 = 0 + -140 Combine like terms: 0 + -140 = -140 4X + X2 = -140 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 = -140 + 4 Reorder the terms: 4 + 4X + X2 = -140 + 4 Combine like terms: -140 + 4 = -136 4 + 4X + X2 = -136 Factor a perfect square on the left side: (X + 2)(X + 2) = -136 Can't calculate square root of the right side. The solution to this equation could not be determined.
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