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Simplifying x2 + 144 = (x + 2)(x + 2) Reorder the terms: 144 + x2 = (x + 2)(x + 2) Reorder the terms: 144 + x2 = (2 + x)(x + 2) Reorder the terms: 144 + x2 = (2 + x)(2 + x) Multiply (2 + x) * (2 + x) 144 + x2 = (2(2 + x) + x(2 + x)) 144 + x2 = ((2 * 2 + x * 2) + x(2 + x)) 144 + x2 = ((4 + 2x) + x(2 + x)) 144 + x2 = (4 + 2x + (2 * x + x * x)) 144 + x2 = (4 + 2x + (2x + x2)) Combine like terms: 2x + 2x = 4x 144 + x2 = (4 + 4x + x2) Add '-1x2' to each side of the equation. 144 + x2 + -1x2 = 4 + 4x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 144 + 0 = 4 + 4x + x2 + -1x2 144 = 4 + 4x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 144 = 4 + 4x + 0 144 = 4 + 4x Solving 144 = 4 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 144 + -4x = 4 + 4x + -4x Combine like terms: 4x + -4x = 0 144 + -4x = 4 + 0 144 + -4x = 4 Add '-144' to each side of the equation. 144 + -144 + -4x = 4 + -144 Combine like terms: 144 + -144 = 0 0 + -4x = 4 + -144 -4x = 4 + -144 Combine like terms: 4 + -144 = -140 -4x = -140 Divide each side by '-4'. x = 35 Simplifying x = 35
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