(9x² + 8y² – 12) – (12y² – 3x² – 16)
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12x2+1x-15. (x-y)(2x-3y). 2x²-3xy-zxy+3y². 2x²=5xy+3y². ② (atb) (zatb) za²+ ab +2ab+b² za²+3 ab+ba. 2. ... 2x² - xy + 6xy-3y². 2x²+xy-3y². 0 (x+2y)(3x+4y). 3x² + 4xy+6xy +8y². 3x² + loxy + 8y². ☺ (3x+y)2. 9x² +6xy + y². -1- ...
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