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(x+8)(x-8)=36
x²-64=36
x²=100
x=10cm
P=x²=100cm²
x²-8x+8x+64=36
x²=100
x=10(cm)
P=x²=100(cm²)
Odp. Pole kwadratu wynosi 100cm²
(x-8) bok po zmniejszeniu
Pole=(x+8)(x-8)=x kwadrat-64
xkwadrat-64=36
x kwadrat=100
x=10
pole=10*10=100