Math, asked by sonaliraazz, 2 months ago

simplify ( 2+√5)(2-√5)

Answers

Answered by chemistrywala

4

(2+√5)(2-√5)= 2²-(√5)²== 4-5= -1

Hence answer is -1

Answered by saran00766

3

Answer:

(a+b)(a-b)=a²-b²)

( 2+√5)(2-√5)

=2²- (√5)² or

=2²-5

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