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-1 vote

Expand: (W - 9)2

Asked on by | Votes -1 | Views: 65 | Tags: algebra     | quantitative aptitude     | Add Bounty

Expand: (W - 9)2


1). (W2 - 9w + 81)
2). (W2 - 9w + 18)
3). (W2 - 18w + 81)
4). (W2 - 18w - 81)


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1 answers

2 vote
Answered by on | Votes 2 |

We know that,

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

⇒ (W - 9)2 = W2 - 18W + 81

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