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Evaluate (4.6)² using (a+b)²=a²+b²+2ab
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9 votes
Evaluate (4.6)² using (a+b)²=a²+b²+2ab

User Sstock
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1 Answer

3 votes
3 votes

(4.6)²

= (4+ 0.6)²

Using identity–

(4+ 0.6)²

= 4² + 2× 4 ×0.6 +(0.6)²

=16 + 4.8 + 0.36

= 21.16

User Chadwick
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