(2x + 3y)(2x+3y)

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Sia ? 6 years, 2 months ago
We have,
(2x + 3y)(2x - 3y) = (2x)2 - (3y)2 [Using (a + b)(a - b) = a2 - b2]
{tex}\Rightarrow{/tex} (2x + 3y)(2x - 3y) = 4x2 - 9y2
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