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Kazeer [188]
3 years ago
7

Evaluate (101.5)²-(100.5)²​

Mathematics
1 answer:
makvit [3.9K]3 years ago
8 0

You can exploit the difference-of-squares identity,

<em>a</em>² - <em>b</em>² = (<em>a</em> - <em>b</em>) (<em>a</em> + <em>b</em>)

Then

101.5² - 100.5² = (101.5 - 100.5) * (101.5 + 100.5)

101.5² - 100.5² = 1 * 202

101.5² - 100.5² = 202

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