Question

What is the product of the radical expression?

(7-√2)(8+√2)

A. 54 + 56 √2
B. 13 + 15 √2
C. 54 - √2
D. 58 + 56 √2

Please help :)

Answer 1

What does \[(x-y)(z+y) = ?\]

If you simplify that you will be able to get the answer to this question.

Answer 2

first we multiply:
\[(7-\sqrt{2}) \times (8 + \sqrt{2})\]
then we get:
\[56 - \sqrt{2} -2\]
which simplifies to
\[54 - \sqrt{2}\]
which happens to be C