Zadanie
Pole kwadratu P₁
P₁ = b²
Pole prostokąta P₂
a = b + 2
c = b - 3
P₂ = a · c
P= (b + 2)·(b - 3) = b² - 3b + 2b - 6 = b² - b - 6
P₁ - P₂ = b² - (b² - b - 6) = b² - b² + b + 6 = b + 6
Odp. D
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Zadanie
Pole kwadratu P₁
P₁ = b²
Pole prostokąta P₂
a = b + 2
c = b - 3
P₂ = a · c
P= (b + 2)·(b - 3) = b² - 3b + 2b - 6 = b² - b - 6
P₁ - P₂ = b² - (b² - b - 6) = b² - b² + b + 6 = b + 6
Odp. D