factorise 9x²-16=...............
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Step-by-step explanation:
3x^2-4
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Rewrite 9x2 9 x 2 as (3x)2 ( 3 x ) 2 . Rewrite 16 as 42 . Since both terms are perfect squares, factor using the difference of squares formula, a2−b2=(a+b)(a−b) a 2 - b 2 = ( a + b ) ( a - b ) where a=3x a = 3 x and b=4 .
Step-by-step explanation:
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