(3b-c)(3b+c) = (3b)²-c² = 9b²-c²
(x+4)(4-x) = (4+x)(4-x) = 4²-x² = 16-x²
36n²-49 = (6n)²-7² = (6n+7)(6n-7)
y⁴-25 = (y²)²-5² = (y²-5)(y²+5)
Ответ: С
(3b-c)(3b+c) = (3b)²-c² = 9b²-c²
(x+4)(4-x) = (4+x)(4-x) = 4²-x² = 16-x²
36n²-49 = (6n)²-7² = (6n+7)(6n-7)
y⁴-25 = (y²)²-5² = (y²-5)(y²+5)
Ответ: С