Dr CK Lee’s Additional Mathematics Classes ( 91473612 or check out http://ascklee.org/)

1

Solutions to Exercise 3E (p. 91−92) from The Keng Seng, Loh Cheng Yee, Joseph Yeo and Ivy Chow’s New Syllabus Mathematics 2: 6th Edition (Textbook) Question 5 makes use of the identity: ( )( ) 5(a)

( )( )

( )( )

5(b)

( )( )

( )( )

5(c)

( )( )

( )( )

5(d)

( )( )

( )( )

5(e)

( )( )

( )( )

5(f)

( )( )

( )( )

5(g)

( )( )

( )( )

Dr CK Lee’s Additional Mathematics Classes ( 91473612 or check out http://ascklee.org/)

2

5(h)

( )( )

( )( )

5(i)

( )( )

( )( )

5(j)

( )( )

( )( )

6(a)

( )

( )

6(b)

( )

6(c)

( )

6(d)

( )

6(e)

( )

6(f)

Dr CK Lee’s Additional Mathematics Classes ( 91473612 or check out http://ascklee.org/)

3

( )

7(a)

( ) [ ( )][ ( )]

[ ][ ]

7(b)

( ) [ ( )][ ( )]

[ ][ ]

7(c)

( ) [( ) ][( ) ]

[ ][ ]

[ ][ ]

( )

7(d)

( ) ( )

[ ( )]

[ ]

[ ( )][ ( )]

( )( )

7(e)

( ) ( )

[ ( )]

( )

[( ) ][( ) ]

( )( )

7(g)

( )

( )( )