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Question
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`(4x^2)/9 - (9y^2)/16`
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Solution
We have,
`(4x^2)/9 - (9y^2)/16 = ((2x)/3)^2 - ((3y)/4)^2`
= `((2x)/3 + (3y)/4)((2x)/3 - (3y)/4)`
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