The perimeter of a rectangle is 12cm .The area 5cm ^3What is the length of the sides?
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Answer:
2(l+b)= 12
l+b= 6----->(1)
l×b =5------>(2)
from (1)
b=6-l
solve in eq (2)
l(6-l)=5
6l-l^2=5
l^2-6l+5=0
l^2-5l-l+5=0
l(l-5)-1(l-5)=0
(l-5)=0 and (l-1)=0
l=5 l=1
next solve l=5 b=1
or l=1 b=5
there are two cases so hence this is the answer
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