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(7-√(2)) (7-√(2)) I NEED HELP PLEASE
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21 votes

(7-√(2)) (7-√(2))
I NEED HELP PLEASE

User Tuan Chau
by
5.6k points

2 Answers

7 votes

Answer:

51 - 14√2

Explanation:

Identity used :

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

Solving :

  • (7 - √2)(7 - √2)
  • (7 - √2)²
  • (7)² - 2(7)(√2) + (√2)²
  • 49 - 14√2 + 2
  • 51 - 14√2
User Lorenzo Marcon
by
5.2k points
6 votes
The answer should be 31.20 :)
User Ermin
by
5.3k points
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