Math, asked by ojhashrija, 7 months ago

The value of (2 +√5 )( 2– √5 ) is

(a) 1 (b)-1 (c) 2 (d) none​

Answers

Answered by prakash2020
0

Answer:

b.-1

Step-by-step explanation:

(2+√5)(2-√5)=2^2-(√5)^2

=4-5

=-1 because of using formula a^2-b^2=(a+b)(a-b)

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