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P=6ab-4a²
P=x*y
6ab-4a²=2a*y
(6ab-4a²):2a=y
3b-2a=y
y=3b-2a
x=2a
Obw=2x+2y
Obw=2*2a+2(3b-2a)
Obw=4a+6b-4a
Obw=6b
Odp: Obwód jest równy 6b.
P=x*y
6ab-4a²=2a*y
(6ab-4a²):2a=y
3b-2a=y
y=3b-2a
x=2a
Ob=2x+2y
Ob=2*2a+2(3b-2a)
Ob=4a+6b-4a
Obwód=6b