Ответ:
(5а²-3b)²-16a⁴=25a⁴+9b²-16a⁴=31a⁴+9b²
(2a+3b)²-(4a-5b)²=4a²+9b²-16a²-25b²=-12a²-41b²
m⁸-(3c-2m⁴)²=m⁸-9c²+4m⁸=5m⁸-9c²
(x-y+t)²-(x-y-t)²=x²+y²+t²-x²+y²+t²=2y²+2t²
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Ответ:
(5а²-3b)²-16a⁴=25a⁴+9b²-16a⁴=31a⁴+9b²
(2a+3b)²-(4a-5b)²=4a²+9b²-16a²-25b²=-12a²-41b²
m⁸-(3c-2m⁴)²=m⁸-9c²+4m⁸=5m⁸-9c²
(x-y+t)²-(x-y-t)²=x²+y²+t²-x²+y²+t²=2y²+2t²