Question 15 Factorise 21-9x

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asked Jun 24, 2019 159k views

1 Answer

Ben Hamill · Answer 1 · 2019-06-28T15:01:33+0000

The factored form would be 3(7-3x).

The GCF of these two is 3; that is the largest number either of them can be divided by, and they do not have a variable in common. This gives us:

3( )

21/3 = 7, so we have:
3(7 )

9x/3 = 3x, which gives us

3(7-3x)

Question 15 Factorise 21-9x

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