(197)^2-(97)^2 evaluate without using calculator or table

1 answer:

3 0

Answer:

29400

Step-by-step explanation:

$formula: \\ {a}^{2} - {b}^{2} = (a + b)(a - b) \\ ( {197)}^{2} - ( {97)}^{2} \\ = (197 + 97)(197 - 97) \\ = 294 \times 100 \\ = 29400 \\$

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