evaluate the following by using suitable identities 97❌93
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1
97❌93
= (95+2)(95-2)
= (95)²-(2)²
= 9025-4
= 9021
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Question :
Evaluate by using suitable identities :
97 × 93
Answer :
= 97 × 93
=(100 - 3) (100 - 7)
= 100² + 100 × (-3-7) - 3 × (-7)
= 10000 + 100(-10) +21
= 10000 - 1000 + 21
= 9021
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