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Syllabus

Expand: (98)2 -

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Question

Expand: (98)2

Sum

Solution

(98)2

= (100 - 2)2

= 1002 - 2 x 100 x 2 + 22

= 10000 - 400 + 4

= 9604.

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