Question

Factorise 9x^2 - 4 in step by step method
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Answer 1

Answer:

( 3 x − 2 ) ( 3 x + 2 )

Step-by-step explanation:

a ^2  −  b ^2  =  ( a − b ) ( a + b )

let,

a ^2  =  9 x ^2 ,  and  b ^2  =  4

a  =  3 x ,  b  =  2

9 x ^2 − 4  =  ( 3 x − 2 ) ( 3 x + 2 )

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