Question

(11 + √11)(11-√11)
$(11 + \sqrt{11)}(11 - \sqrt{11)}$
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Answer 1

Given

(11 + √11)(11 - √11)

Solve it

Solution

★Applying identity to solve this question : a² - b² = (a + b)(a - b)

→ (11 + √11)(11 - √11)

→ (11)² - (√11)²

→ 121 - 11

→ 110

Some identities

• (a + b)² = a² + b² + 2ab
• (a - b)² = a² + b² - 2ab
• a³ - b³ = (a -b)(a² + ab + b²)
• a³ + b³ = (a +b)(a² - ab + b²)
• (a +b)³ = a³ + b³ + 3ab(a+b)
• (a -b)³ = a³ - b³ - 3ab(a-b)

Answer 2

Answer:

110 is thw answer because we know (a +b) (a - b) = a ka Square minus b ka Square