1.

Give possible expression for the length and breadth of the rectangle whose area is given by 4a2 +4a – 3.

Answer»

Given, area of rectangle = 4a2 + 6a - 2a - 3

= 4a2 + 4a – 3 [by splitting middle term]

= 2a(2a + 3) -1 (2a + 3)

= (2a – 1)(2a + 3) 

Hence, possible length = 2a -1 and breadth = 2a + 3.



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