Question

( a + b ) ( c - d ) + ( a - b ) ( c - d ) + 2 ( ac - bd ) + 4b ( a + c)​

Answer 1

Step-by-step explanation:

(a + b) (c -d ) + ( a -b) (,c- d) + 2 (ac - vs ) + 4b (a+ c )

= ac - ad +bc - bd + ac - ad -bc + bd + 2ac - 2bd + 4ab + 4bc

= -2ad + 2ac - 2bd + 4ab + 4bc