Question

Factorise each of the following: 125a² – 45b² using identites​

Answer 1

Answer:

Step-by-step explanation:

125a^2-45b^2

5(25a^2-9b^2)

using a^2-b^2=(a-b)(a+b)

5(5a-3b)*(5a+3b)

5(5a-3b)(5a+3b)

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Answer 2

Answer:

125a^2 - 45b^2

Step-by-step explanation:

5 (25a^2 - 9b^2) .......( taking 5 common)

5 [ (5a)^2 - (3b)^2]

(a^2 - b^2) = (a-b) (a+b)

5 [ ( 5a-3b) (5a+3b) ]