show that (5 - root3) (5 + root3) is rational
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2
(5 - root3) (5 + root3)
25 +5root3 - 5root3 - 3
25 - 3
22.
25 +5root3 - 5root3 - 3
25 - 3
22.
Answered by
1
(5 - root3)(5+roo3)
formula (a2-b2)
25-3=22
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