Question

factorise ( x + 3 ) ( 7x + 21 )

Answer 1

Ans: 7(x+3)²
Thanks!

Answer 2

$\textbf {Hey there, here is the solution.}$

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( x + 3 ) ( 7x + 21 )

Take out 7 as the common factor from (7x + 21):

(x + 3) (7) (x + 3)

Since the 7 in the middle is awkward, we put the 7 in the beginning:

7 (x + 3) (x + 3)

Both (x + 3) are identical, we can combine them:

7 (x + 3)²

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Answer: 7 (x + 3)²

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⭐$\textbf {Cheers}$⭐