Question

1.  Find (2x + 3y)2 using algebraic identities.

2.  Using suitable identities find (1092)2.

3.  Using the identity (a-b)2 = a2 � 2ab + b2, find (5a � 7b)2.

4.  Find 194 * 206 using suitable identity.

5.  Use a suitable identity to find the product of (3a � 1/3)(3a � 1/3).

6.  The length and breadth of a rectangle are 3x2 � 2 and 2x+ 5 respectively. Find its area.


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Answer 1

Answer:

1. 4x²+ 12xy + 9y²

2. 1192464

3. a²-2ab+b², (5a-7b) = 25a² - 70ab+ 49b²