Math, asked by neha13025, 5 hours ago

simplify (7+√2)(7-√2)​

Answers

Answered by rosie9035
11

Step-by-step explanation:

(7+√2)(7-√2)

=7²-√2²

=49-2

=47 Ans.

Answered by BrainlyArnab
4

47

Step-by-step explanation:

Q.

simplify (7 + 2)(7 - 2)

Solution -

(7 + 2)(7 - 2)

=> (7)² - (2)².....[using identity (a+b)(a-b) = - , here a = 7 & b = 2]

=> 7² - 2²

=> 49 - 2

=> 47

Hence the simplification is 47.

Note :-

Some formulas (identities), you should remember -

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

hope it helps.

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