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2 a +4m
Area rectang= 77 m a a
a + 4m
lados: a, a, b, b
b= a + 4 m
area= Baser x h
area= a( a + 4 m )
2
area= a + 4a
ecuacion cuadrática
2
a + 4a - 77= 0
Resolviendola obtenes
a= 7 y a= 11
por lo tanto a= 7 y obtenes
lado a= 7
lado b= 11