Question

a) Find the value of (√3-√7) (√3+√7).
Pls hurry its urgent​

Answer 1

Answer:

begin{gathered}(3-\sqrt{7})(3+\sqrt{7})\\=3^{2} - (\sqrt{7 )^{2}\end{gathered} (a-b)(a+b)= a²-b²

\begin{gathered}=9 -7\\=2\end{gathered}

=9−7

=2

(the root sign gets cancelled with the square)