English
Syllabus

Expand: (2x + 3y)2 -

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Question

Expand: (2x + 3y)2

Sum

Solution

(2x + 3y)2

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

= 4x2 + 12xy + 9y2.

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Expansion of (a + b)2 = a2 + 2ab + b2
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