Question

1
3. Factorise the following using appropriate identities:
9x + 6xy + y2
Gif 4y» - 4y + 1
y?
100​

Answer 1

Answer:

(i) 9x

2

+6xy+y

2

=(3x)

2

+2(3x)(y)+(y)

2

=(3x+y)

2

(ii) 4y

2

−4y+1=(2y)

2

−2(2y)(1)+1=(2y−1)

2

(iii) x

2

−

100

y

2

=(x)

2

−(

10

y

)

2

=(x−

10

y

)(x+

10

y

)