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2 votes
Evaluate (101.5)²-(100.5)²​

User DonL
by
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1 Answer

2 votes

You can exploit the difference-of-squares identity,

a² - b² = (a - b) (a + b)

Then

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

101.5² - 100.5² = 1 * 202

101.5² - 100.5² = 202

User Altug
by
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