Question

Упростите выражение:7 (b+2)-5 (b-2)

Answer 1

7b+14-5b+10=2b+24
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Answer 2

Спасибо

Answer 3

$boldsymbol{7 (b+2)-5 (b-2)}= \ \ =7b+14-5b+10 = \ \ = (7b-5b)+(14+10) = \ \ = boldsymbol{2b+24;} \ \ \ \ boxed{boldsymbol{OTBET:2b+24}}$