Question

(4+ √a) (4-√a)……………..

Answer 1

Ответ:

$16-a$

Объяснение:

$(4+\sqrt a)(4-\sqrt a)=4^2-(\sqrt a)^2=16-a$

Answer 2

It seems like you're asking about the expansion of the expression:

(4 + √a)(4 - √a)

This expression can be simplified using the difference of squares formula, which states that:

(a - b)(a + b) = a^2 - b^2

In your expression, a = 4 and b = √a. So, applying the difference of squares formula:

(4 + √a)(4 - √a) = 4^2 - (√a)^2 = 16 - a

So, the expansion of the given expression is:

16 - a