Factorisation Using Grouping and Common Factors

Factorisation Using Grouping and Common Factors

Secondary 2

Factorise each of the following expressions completely.

  1. \(y\left( 2x-k \right)+3\left( k-2x \right)\)
  2. \(-4pqr+6pq-2{{r}^{2}}+3r\)
  3. \(8px-15ay-6py+20ax\)

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Answer:(a) \(\left( 2x-k \right)\left( y-3 \right)\) (b) \(\left( 3-2r \right)\left( 2pq+r \right)\) (c) \(\left( 4x-3y \right)\left( 2p+5a \right)\)

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