Question

multiply and simplify

(√(x)-2√(2))(√(x)+2√(2))

(√(x)+√(2))^2

Answer 1

Top one - difference of squares. Do these with your eyes closed.

\(\sqrt{x}^2 = x\)
\((2\sqrt{2})^{2} = 8\)

You're almost done.

Answer 2

this is all for the first equation @tkhunny?

Answer 3

That's why I said "top one". (a+b)(a-b) = a^2 - b^2

The bottom one is the square of a binomial. This should give you a perfect square trinomial. You should be familiar with this structure, too. (a+b)^2 = a^2 + 2ab + b^2