Question

Factorise 49p³q-36pq

Answer 1

Answer:

pq (7p - 6)(7p + 6)

Step-by-step explanation:

49p³q - 36pq

= pq (49p² - 36)

= pq [(7p)² - (6)²]

∵ a² - b² = (a + b)(a - b)

∴ pq [(7p)² - (6)²] = pq [(7p - 6)(7p + 6)]

                           = pq (7p - 6)(7p + 6)

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