Question

Factorise each of the following polynomial by regrouping.

1) 9pr + p - 9r - 1

Answer 1

Answer:

9pr + p - 9r - 1

=9pr-9r+p-1

=9r(p-1)+1(p-1)

=(p-1)(9r+1)

Answer 2

EVALUATION★

• $= 9pr + p - 9r - 1$
• can we be this written as

• $= 9pr - 9r + p - 1$
• take common 9r and +1

• $= 9r(p - 1) + 1(p - 1) \\ \\ = (9r + 1)(p - 1)$
• factorise

• $= (9r + 1)(p - 1)$
• ✅

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I hope it helps you