Question

simplify (2√3+√5) (2√3-√5)​

Answer 1

Answer:

1......................

Answer 2

Answer:

7 is the required answer.

Step-by-step explanation:

here, we are using this identity→a²-b² = (a+b)(a-b)

⇒(2√3(2√3-√5)+√5(2√3-√5)

⇒(12-2√15)+(2√15-5)

⇒(12-2√15)+2√15-5)

⇒12-5=7

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