rainbow_rocks03
  • rainbow_rocks03
PLZ HELP NO DIRECT ANSWERS...will medal+fan. Which is equivalent to the expression shown when a>0 and b>0?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
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rainbow_rocks03
  • rainbow_rocks03
|dw:1440439527592:dw|
rainbow_rocks03
  • rainbow_rocks03
|dw:1440439634803:dw|
ikram002p
  • ikram002p
what have u tried ?

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More answers

rainbow_rocks03
  • rainbow_rocks03
i dont understand this
ikram002p
  • ikram002p
ok :) so basically u can delete common terms in numerator and denominator according to this statement \(\Large \dfrac{a}{a}=1 \)
rainbow_rocks03
  • rainbow_rocks03
ok
ikram002p
  • ikram002p
so what can u cancel from this ?|dw:1440440526567:dw|
ikram002p
  • ikram002p
for example |dw:1440440587931:dw|
ikram002p
  • ikram002p
what else can u cancel to make in the simplest form ?
rainbow_rocks03
  • rainbow_rocks03
the a's
ikram002p
  • ikram002p
yes one of them note that \(\Large a^2=a.a\)
ikram002p
  • ikram002p
|dw:1440440792739:dw| now whats left ?
ikram002p
  • ikram002p
PS : 21=3*7 & 35=5*7
rainbow_rocks03
  • rainbow_rocks03
3*7=21 & 5*7=35
rainbow_rocks03
  • rainbow_rocks03
so my answer would be d? @ikram002p
SolomonZelman
  • SolomonZelman
I don't think you need to know that \(\color{blue}{\left\{a,~b\right\}>0}\).
rainbow_rocks03
  • rainbow_rocks03
@ikram002p ?
ikram002p
  • ikram002p
don't forget the minus sign `-`
rainbow_rocks03
  • rainbow_rocks03
oh so my answer would be c
SolomonZelman
  • SolomonZelman
Don't really know why the posted it, if b/b and a/a is 1 for any a even if was \(i\cdot \psi \cdot e \cdot \pi\)
ikram002p
  • ikram002p
we have canceled b from numerator
ikram002p
  • ikram002p
@SolomonZelman she need to know since a^2=a.a :D to be more accurate about the answer
SolomonZelman
  • SolomonZelman
a•a you mean by a.a ?
SolomonZelman
  • SolomonZelman
\(\large\color{black}{ \displaystyle \frac{ -21a^2b }{35ab} =\frac{(-3)\cdot7\cdot a \cdot a \cdot b}{5 \cdot 7\cdot a \cdot b} =\frac{(-3)\cdot a}{b}\times \frac{7\cdot a \cdot b}{7\cdot a \cdot b}}\) i haven't crossed any numbers out, all I did so far is a rearrangement that is valid \(\forall~~a,b\) (for all a and b)
ikram002p
  • ikram002p
yes which looks more nice :)
SolomonZelman
  • SolomonZelman
Thanks:) I mean even if there is any point in making a>0, though in by "b" we would never need such a condition.
SolomonZelman
  • SolomonZelman
oh, they should have said b and a are not 0, tho' ....
SolomonZelman
  • SolomonZelman
ok, now you know that because they said a and b >0. So Blank/Blank = 1, right?
SolomonZelman
  • SolomonZelman
u left with. ....
ikram002p
  • ikram002p
i agree with u but OP seems left :P

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