а)(b – 5)^2 = b^2 - 10b + 25
б)(4a + c)^2 = 16a^2 + 8ac + c^2
в)(p^2 + q)(p^2 – q) = p^4 - q^2
а)4(5a – b)(5a + b) = 4(25a^2 - b^2) = 100a^2 - 4b^2
б)(c^4 + d^3)^2 = c^8 + 2c^4d^3 + d^6
в)(x + 6)^2 – (x – 6)^2 = x^2 + 12x + 36 - (x^2-12x+36) =
=x^2 + 12x + 36 - x^2 + 12x - 36 = 24x