Question

2 задание пожалуйста помогите!!!!! ​

Answer 1

Объяснение:

$ac + ad + bc + bd =a (c + d) + b(c + d) = (c + d)(a + b) \\ ac - ad - bc + bd = a(c - d) - b(c - d) = (c - d)(a - b) \\ ac + ad - bc - bd = a(c + d) - b(c + d) = (c + d)(a - b) \\ a c - ad + b c - bd = a(c - d) + b(c - d) = (c - d)(a + b)$