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Simplifying (7xy)(9xy) = 0 Remove parenthesis around (7xy) 7xy(9xy) = 0 Remove parenthesis around (9xy) 7xy * 9xy = 0 Reorder the terms for easier multiplication: 7 * 9xy * xy = 0 Multiply 7 * 9 63xy * xy = 0 Multiply xy * xy 63x2y2 = 0 Solving 63x2y2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '63'. x2y2 = 0 Simplifying x2y2 = 0 The solution to this equation could not be determined.
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