RRB NTPC · Algebraic Expansions

Exercise and reference answers

Matching pairs

1. Left

   Expand (x + 5)^2

   Right

   x^2 + 10x + 25

2. Left

   Expand (x + 3)(x - 3)

   Right

   x^2 - 9

3. Left

   Factorise x^2 + 3x

   Right

   x(x + 3)

4. Left

   Factorise x^2 + 5x + 6

   Right

   (x + 2)(x + 3)

Instructions

Match each expression to expanded form or factors