Question

Radical Expressions and Equations Help:

(8+√11)(8 -√11)

Straight up answer if you can.
Answers
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53
75 + 16 √11
-57
64 + √11

Answer 1

\(\Large \color{MidnightBlue}{\Rightarrow (a + b)(a - b) = a^2 - b^2 \Longleftrightarrow (8 + \sqrt{11})(8 - \sqrt{11}) = 64 - 11 = 53 }\)

Answer 2

Oops, let me fit in the next line here:

\(\Large \color{MidnightBlue}{\Rightarrow = 64 - 11 }\)
\(\Large \color{MidnightBlue}{\Rightarrow = 53 }\)

Answer 3

Thanks, and one more question, what math grade level is this stuff in?

Answer 4

Idk, these are radicals. This is pre-algebra stuff I guess.

Answer 5

Cool. thanks again. Closing. Might have more. QQ....

Answer 6

Sure, turn up if you need.