In a certain town there were 348 robberies last year. This year the number of robberies has gone down 40%. How many robberies we
2 answers:
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Step-by-step explanation:
<h3><u>Given Question :-</u></h3>Given expression is
<em>On rationalizing the denominator, we get </em>
<em>We know, </em>
<em>So, using this, we get </em>
Hence,
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<h2>More Identities to know :- </h2>(a + b)² = a² + 2ab + b²
(a - b)² = a² - 2ab + b²
a² - b² = (a + b)(a - b)
(a + b)² = (a - b)² + 4ab
(a - b)² = (a + b)² - 4ab
(a + b)² + (a - b)² = 2(a² + b²)
(a + b)³ = a³ + b³ + 3ab(a + b)
(a - b)³ = a³ - b³ - 3ab(a - b)