Question

(a+b) (22-3b+c)-(20-3b)c
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Answer 1

Here is your answer:

(a+b)(2a-3b+c)-(2a-3b)c

=a(2a-3b+c) +b(2a-3b+c) -[ 2a(c) - 3b(c)]

=2a2 - 3ab+ ac + 2ab - 3b2 +bc - 2ac + 3bc

=2a2 -ab -ac+4bc-3b2

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