## FeoNeo33 2 years ago Radical Expressions and Equations Help: (8+√11)(8 -√11) Straight up answer if you can. Answers ------- 53 75 + 16 √11 -57 64 + √11

1. ParthKohli

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

2. ParthKohli

Oops, let me fit in the next line here: $$\Large \color{MidnightBlue}{\Rightarrow = 64 - 11 }$$ $$\Large \color{MidnightBlue}{\Rightarrow = 53 }$$

3. FeoNeo33

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

4. ParthKohli

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

5. FeoNeo33

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

6. ParthKohli

Sure, turn up if you need.