1. therefore then
Find each root: your answer is correct.
These should be explained to you better, so here I go:
If you have an equation like: than you can use the cross-product rule to say:
Radicals: Just something most people tend to not know,
therefore when you see something like you can say it equals and then use the rule of exponents to say: which simplifies to
for some reason I really don't feel like answer most of your questions now, so I'll let someone else do that.
#2 I'm having trouble understanding what the problem is with #2, since than therefore
but I assume you've done a typo somewhere...
multiply both sides by and you'll get:
now think back and you'll remember that (a+b)(a-b)=(a^2-b^2).
get rid of parentheses:
now use the quadratic formula:
use the principle square root:
are you asking how to change an equation like this into this:Originally Posted by Chester
Well, I'll tell you even if this isn't what you're asking...
we have equation so to change this equation the first step would be by multiply both sides by look below:
multiply both sides by :
so then we get:
so multiply both sides by and you get:
let's test it out:
change it around and you get:
you see? it works!