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in Algebraic Expressions by (31.2k points)
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(82)2 – (18)2 = ? 

A. 8218 

B. 6418 

C. 6400 

D. 7204

1 Answer

+1 vote
by (30.8k points)
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Best answer

(82)2 – (18)2 

By using (a – b)(a + b) 

= a2 – b2 = (82 – 18)(82 + 18) 

= (64)(100) 

= 6400

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