Ответ:

Пошаговое объяснение:

1) 8a(x+2y)-3b(x+2y) = (x+2y)(8a-3b)

2) (3a+1)²-4b²=(3a+1-2b)*(3a+1+2b)

3) n(m-k) - (m²-2mk+k²) = n(m-k) - (m-k) ² = (m-k) * (n-(n-k)) = (m-k) *(n-m+k)

4) (x²-1-(x²+2))*(x²-1+(x²+2)) = (x²-1-x²-2)*(x²-1+x²+2) = (-1-2)*(2x²+1) = - 3(2x²+1)

5) (7+5x-(3x-2))*(7+5x+(3x-2)) = (7+5x-3x+2)*(7+5x+3x-2) = (9+2x)*(5+8x)