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Question

Match the following:

A

B

1)

(m + 2n) (m − 2n)

a)

m2 − 16

2)

(3m + n) (3mn)

b)

4m2 − 25n2

3)

(m + 4) (m − 4)

c)

4m2 + 25n2

4)

(2m + 5n) (2m − 5n)

d)

m2 − 4n2

e)

9m2 + n2

f)

9m2n2

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Solution

Using the identity (a + b) (ab) = a2b2:

(1)

(2)

(3)

(4)

Hence, the match is (1) − (d), (2) − (f), (3) − (a) and (4) − (b)


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