Question

pls give me the answer pls pls
pls pls
give me the answer​

Answer 1

Answer:

(40-3)(50-2)=(40×50)-(40×2)-(3×50)+(3×2)

(100-2)(80-4)=(100×80)-(100×4)-(2×80)+(2×4)

(200-4)(100-1)=(200×100)-(200×1)-(4×100)+(4×1)

(400-5)(300-2)=(400×300)-(400×2)-(5×300)+(5×2)