Question

multiply
(4+√10)(4-√10)

Answer 1

This is a difference of 2 squares:
\[(a+b)(a-b) = a^{2}-b^{2}, a = 4, b = \sqrt{10}\]
so just following the formula we get:
\[a^{2} - b^{2} = (4)^{2}-(\sqrt{10})^{2}= 16- 10 = 6\]

Answer 2

thank u...

Answer 3

same answer and work - 16-10=6