Expand and simplify (2V5 + 1)(3V5 - 1)

Traceyann asked Sep 14, 2023

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Traceyann asked Sep 14, 2023

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14 votes

Answer:

29+√(5)

Explanation:

Let
√(5) = a for simplicity. now our equation is

(2a+1)(3a-1)

now expand

2a*3a-2a+3a-1 = 6a^2+a-1

remember that
√(5) = a

thus we get
6√(5)^2+√(5)-1 = 6(5)-1+√(5)=30-1+√(5)=29+√(5)

TNT answered Sep 20, 2023

by TNT

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