2-May-15 Factorise using the difference of two squares (a)x 2 – y 2 (b) w 2 – z 2 (c) 9a 2 – b 2 (d)16y 2 – 100k 2 (x + y )( x – y ) ( w + z )( w – z ) ( 3a + b )( 3a – b ) ( 4y + 10k )( 4y – 10k ) Difference of Two Squares Int 2
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