Hey, I have a problem: solve for exact value (simplest radical form) $-3\sqrt{27}$ , the result is $-9 \sqrt3$ . I'm in 8th grade studying for a Math placement test to take trigonometry as a freshman next year. This doesn't seem to be covered in my textbook. Can anyone explain to me what's going on here? Thanks!
Answer
Presumably you are familiar with the rule that (for positive $a$ and $b$) $$\sqrt{a\times b}=\sqrt{a}\,\,\times\sqrt{b}$$ Can you see how to break up 27 into $a\times b$ for the right $a$ and $b$?
No comments:
Post a Comment