It is possible to factorise 4x²-9 further.
Factorising is to express a number or expression as a product of factors.
The technique of factorising two terms: a² - b² = (a + b) (a - b)
If we apply ( 4x²-9 ) to the previous technique: 4x² - 9 = (2x + 3) (2x - 3)
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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.
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