Question

simplify using identities (109)² + (91)²​

Answer 1

Answer:

(100+9)²+(100-9)²

(10000+81+1800)+(10000+81-1800)

20000+162

20162

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Answer 2

(109)² + (91)²

= (100 + 9)² + (100 - 9)²

= 100² + 9² + 2(100)(9) + 100² + 9²  - 2(100)(9)

= 100² + 9² + 100² + 9²

= 10000 + 81 + 10000 + 81

= 20162

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