Ответ:
(7y-5x)(6y+3x)
7y•6y+7y•3x-5x•6y-5x•3x
42y^2+21xy-30xy-15x^2
42y^2-9xy-15x^2
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Ответ:
(7y-5x)(6y+3x)
7y•6y+7y•3x-5x•6y-5x•3x
42y^2+21xy-30xy-15x^2
42y^2-9xy-15x^2