Question

Simplify : ( a + b ) ( b – c ) + ( a – b ) ( c + d ) + 2 ( ac + bd ).

Answer 1

Answer:

Now,

(a+b)(c−d)+(a−b)(c+d)+2(ac+bd)

=(ac+bc−ad−bd)+(ac+ad−bc−bd)+2(ac+bd)

=4ac.

Step-by-step explanation:

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