Math, asked by btsnishi, 9 months ago

(√21+5) (√21-5)
Plz Do fast ​

Answers

Answered by xextremistx
1

Answer:

-4

Step-by-step explanation:

hii fella , see it here

(√21+5) (√21-5)

so there is an expansion/formula i.e :- (a+b) (a-b) = a^2 - b^2

so if we apply this expansion to your question then we get :-

√21^2 - 5^2 = 21 - 25 = -4

hope i helped

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