Ответ:
(5а-3b)(4a-b)
20a²-5ab-12ab+3b²
20a²-17ab+3b²
(2x+3)(5x-4)
10x²-8x+15x-12
10x²+7x-12
(3x+2y)(x-y)
3x²-3xy+2xy-2y²
3x²-xy-2y²
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Ответ:
(5а-3b)(4a-b)
20a²-5ab-12ab+3b²
20a²-17ab+3b²
(2x+3)(5x-4)
10x²-8x+15x-12
10x²+7x-12
(3x+2y)(x-y)
3x²-3xy+2xy-2y²
3x²-xy-2y²