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The value of ( sqrt 5 + sqrt 2 )( sqrt 5 - sqrt 2 )is: (a) 10 (b) 7 (c) 3 (d) sqrt(3

The value of ( sqrt 5 + sqrt 2 )( sqrt 5 - sqrt 2 )is: (a) 10 (b) 7 (c) 3 (d) sqrt(3
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The value of ( sqrt 5 + sqrt 2 )( sqrt 5 - sqrt 2 )is: (a) 10 (b) 7 (c) 3 (d) sqrt(3

asked
User Junayy
by
7.4k points

2 Answers

10 votes

Answer:

(c) 3

Explanation:


(√(5) +√(2) )(√(5) -√(2) )=(√(5) )^(2) -(√(2) )^(2) =5-2=3

Hope this helps

answered
User Basile
by
8.6k points
2 votes

Answer:

C) 3

Explanation:

This is just a differences of squares:


(a+b)(a-b)=(a^2-b^2)\\\\(√(5)+√(2))(√(5)-√(2))=(√(5)^2-√(2)^2)=5-2=3

answered
User Tobltobs
by
8.6k points
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