Use direct method to evaluate the following product: (8 - b) (3 + b)

Question

KnowledgeBoat · Accepted Answer

(8 \- b) (3 \+ b) = (8 3) \+ (8 b \+ (\- b) 3) \+ ((\- b) b) = 24 \+ (8b \- 3b) \- b² = 24 \+ 5b \- b² Hence, (8 \- b) (3 \+ b) = 24 \+ 5b \- b²

Mathematics