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Simplifying (5x + 2y)(5x + 2y) = (5x + 2y)(5x + 2y) Multiply (5x + 2y) * (5x + 2y) (5x * (5x + 2y) + 2y * (5x + 2y)) = (5x + 2y)(5x + 2y) ((5x * 5x + 2y * 5x) + 2y * (5x + 2y)) = (5x + 2y)(5x + 2y) Reorder the terms: ((10xy + 25x2) + 2y * (5x + 2y)) = (5x + 2y)(5x + 2y) ((10xy + 25x2) + 2y * (5x + 2y)) = (5x + 2y)(5x + 2y) (10xy + 25x2 + (5x * 2y + 2y * 2y)) = (5x + 2y)(5x + 2y) (10xy + 25x2 + (10xy + 4y2)) = (5x + 2y)(5x + 2y) Reorder the terms: (10xy + 10xy + 25x2 + 4y2) = (5x + 2y)(5x + 2y) Combine like terms: 10xy + 10xy = 20xy (20xy + 25x2 + 4y2) = (5x + 2y)(5x + 2y) Multiply (5x + 2y) * (5x + 2y) 20xy + 25x2 + 4y2 = (5x * (5x + 2y) + 2y * (5x + 2y)) 20xy + 25x2 + 4y2 = ((5x * 5x + 2y * 5x) + 2y * (5x + 2y)) Reorder the terms: 20xy + 25x2 + 4y2 = ((10xy + 25x2) + 2y * (5x + 2y)) 20xy + 25x2 + 4y2 = ((10xy + 25x2) + 2y * (5x + 2y)) 20xy + 25x2 + 4y2 = (10xy + 25x2 + (5x * 2y + 2y * 2y)) 20xy + 25x2 + 4y2 = (10xy + 25x2 + (10xy + 4y2)) Reorder the terms: 20xy + 25x2 + 4y2 = (10xy + 10xy + 25x2 + 4y2) Combine like terms: 10xy + 10xy = 20xy 20xy + 25x2 + 4y2 = (20xy + 25x2 + 4y2) Add '-20xy' to each side of the equation. 20xy + 25x2 + -20xy + 4y2 = 20xy + 25x2 + -20xy + 4y2 Reorder the terms: 20xy + -20xy + 25x2 + 4y2 = 20xy + 25x2 + -20xy + 4y2 Combine like terms: 20xy + -20xy = 0 0 + 25x2 + 4y2 = 20xy + 25x2 + -20xy + 4y2 25x2 + 4y2 = 20xy + 25x2 + -20xy + 4y2 Reorder the terms: 25x2 + 4y2 = 20xy + -20xy + 25x2 + 4y2 Combine like terms: 20xy + -20xy = 0 25x2 + 4y2 = 0 + 25x2 + 4y2 25x2 + 4y2 = 25x2 + 4y2 Add '-25x2' to each side of the equation. 25x2 + -25x2 + 4y2 = 25x2 + -25x2 + 4y2 Combine like terms: 25x2 + -25x2 = 0 0 + 4y2 = 25x2 + -25x2 + 4y2 4y2 = 25x2 + -25x2 + 4y2 Combine like terms: 25x2 + -25x2 = 0 4y2 = 0 + 4y2 4y2 = 4y2 Add '-4y2' to each side of the equation. 4y2 + -4y2 = 4y2 + -4y2 Combine like terms: 4y2 + -4y2 = 0 0 = 4y2 + -4y2 Combine like terms: 4y2 + -4y2 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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