3) The area of a rectangle is 8a2 + 4a – 60 square units and its length is 2a – 5 units. Find its breadth.
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Answer:
Breadth of the rectangle = (4a -12) cm.
Step-by-step explanation:
Area of rectangle = 8a² +4a -60
Length = 2a-5
8a²+4a -60
= 4(2a² +a -15)
= 4 ( 2a² +6a -5a -15)
= 4 {2a(a-3) -5(a-3)}
= (2a-5)(4a-12)
Breadth = (4a-12) cm .
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