When you factor a number, you break it down into factors that multiply up to the number. For example, 12=3x4.
There is also prime factorize when you factor the number into primes. For example, 100=2^2x5^2.
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To factorise is to find the numbers that divide into the original number by only using prime numbers. For example factorise 20 = 2 times 2 times 5
The answer will depend on where the brackets are. In general the solution would be to expand all the brackets, combine like terms and then factorise.
-5
-5
It is: 6(4x+3)