# Math Help - basic algebra

1. Im Really Sorry Bobak...
Im Just Asking To Check If Im Right...

2. Originally Posted by Graffitixgirl
Im Really Sorry Bobak...
Im Just Asking To Check If Im Right...
btw you can check if your answer is right by putting a value to the variable
ex. $(x - 5)(x + 2)$ = $x^2 - 3x - 10$
so let x be uhm... 1

$(1 - 5)(1 + 2)$ = $1^2 - 3(1) - 10$
$(-4)(3)$ = $1 - 3 - 10$
$-12$ = $-12$

3. just wondering,
if there was a minus in the equation, e.g:
(1+7k)(5-k)
that would equal 5-k???

4. Originally Posted by Graffitixgirl
is it ok if i ask more l8r?
thx so much 4 ur encouragement
yes you can come back. as long as you are willing to try more on your own. it realy doesn't help if we do problems for you. and especially if this is something to hand in, we can only give you hints, or at most solve one problem maybe, which has been done

5. Originally Posted by Graffitixgirl
just wondering,
if there was a minus in the equation, e.g:
(1+7k)(5-k)
that would equal 5-k???
you are multiplying (5 - k) by something that is not 1. how would you get (5 - k)?

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