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anygoal [31]
2 years ago
15

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

Mathematics
2 answers:
kicyunya [14]2 years ago
6 0

Answer:

(c) 3

Step-by-step explanation:

(\sqrt{5} +\sqrt{2} )(\sqrt{5} -\sqrt{2} )=(\sqrt{5} )^{2} -(\sqrt{2} )^{2} =5-2=3

Hope this helps

larisa86 [58]2 years ago
4 0

Answer:

C) 3

Step-by-step explanation:

This is just a differences of squares:

(a+b)(a-b)=(a^2-b^2)\\\\(\sqrt{5}+\sqrt{2})(\sqrt{5}-\sqrt{2})=(\sqrt{5}^2-\sqrt{2}^2)=5-2=3

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