logovislora

Verified answer

1) с²-2² = с²-4
2) 12²-х² = 144-х²
3) (3х)²-у² = 9х²-у²
4) (6х)²-9² = 36х² - 81
5) (7+х)(7-х) = 7²-х² = 49-х²
6) (5а)²-(8b)² = 25a²-64b²
7) (2+8m)(2-8m) = 2²-(8m)² = 4-64m²
8) (13c-14d)(13c+14d) = (13c)²-(14d)² = 169c²-196d².


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