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Ответ:

решение смотри на фотографии

[tex]4c {}^{3} - 32 = 4(c {}^{3} - 8) = 4(c -2 )( {c}^{2} + 2c + 4)[/tex]

[tex](5a + 6) {}^{2} - 81 = (5a + 6) {}^{2} - 9 {}^{2} = (5a + 6 - 9)(5a + 6 + 9) = (5a - 3)(5a + 15) = 5(5a - 3)(a + 3)[/tex]

[tex] {x}^{2} - 2xy + {y}^{2} + x - y = (x - y) {}^{2} + ( x- y) = (x - y)(x - y + 1)[/tex]