Question

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Answer 1

Answer:

This is the answer

Step-by-step explanation:

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Answer 2

a) a^2 - b^2 = (a+b)(a-b)
Thus,
(5 + root5)( 5 - root5)
= (5)^2 - (root5)^2
= 25 - 5
= 20

b) (3 + root3)(2 + root2)
= 3 ( 2 + root2) + root3( 2 + root2 )
= 6 + 3*root2 + 2*root3 + root6

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