Question

simplify the following expressions (5+√5) (5-√5)​

Answer 1

Answer: 20

Step-by-step explanation:

We can clearly see it is

A+B(A-B)

=A^2-B^2

5+√5(5-√5)

=5^2-√5^2

=25-5

=20

Hope it helps

Answer 2

this in the formula of (a-b)(a+b) = a² - b²

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