Question

factorise
4a square -9​

Answer 1

Answer:

4a

2

−9 can be written as (2a)

2

−(3)

2

By using the formula a

2

−b

2

=(a+b)(a−b)

Now solving for the above equation

(2a)

2

−(3)

2

=(2a+3)(2a−3)

Answer 2

Answer:

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Step-by-step explanation:

= 4a 2

= −9 can be written as (2a) 2

= −(3) 2

By using the formula a2,

= −b 2

=(a+b)(a−b)

Now solving for the above equation,

= (2a) 2

= −(3)2

=(2a+3)(2a−3)