Question

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

Answer 1

Answer:

4ac

Step-by-step explanation:

(a+b)(c−d)+(a−b)(c+d)+2(ac+bd)

=(ac+bc−ad−bd)+(ac+ad−bc−bd)+2(ac+bd)

=4ac.