Question

evaluate using proper identity: 117×123​

Answer 1

Answer:

Step-by-step explanation:

WE CAN WRITE

117 = 100+17

83 = 100-17

NOW,

117 × 83

(100+17) (100-17)

USING IDENTITY (A+B)(A-B) = A²-B²

NOW,

(100+17) (100-17)

100²-17²

10000-289

9711

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