anonymous
  • anonymous
Help ?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
@SandeepReddy
anonymous
  • anonymous
what is (a+b)*(c+d) ?

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anonymous
  • anonymous
uhm ?
anonymous
  • anonymous
what is the result of ( a+b)*(c+d) ?
anonymous
  • anonymous
|dw:1363810206819:dw|
anonymous
  • anonymous
something with a fraction
anonymous
  • anonymous
\[a*(b+c) = a*b+a*c \]
anonymous
  • anonymous
@tejadab268 No direct answers please, explain them instead!
anonymous
  • anonymous
his answer wasnt even right
anonymous
  • anonymous
In the same way \[(a+b)*(c+d) = a*(c+d)+b*(c+d)\]
anonymous
  • anonymous
that is a*c+a*d+b*c+b*d
anonymous
  • anonymous
So be it.......
anonymous
  • anonymous
now for help1, help2 and help4 you can use above formulae that i hav given
anonymous
  • anonymous
but Idk how to do it
anonymous
  • anonymous
|dw:1363810963051:dw||dw:1363811076093:dw|
anonymous
  • anonymous
GOt it ?@miah
anonymous
  • anonymous
yes, kind of. I was going to chose that answer. so the second one ?
anonymous
  • anonymous
@SandeepReddy Good Explanation....... And I see I wasn't wrong ;) FOIL METHOD?
anonymous
  • anonymous
sorry :P can you help with the second one ?
anonymous
  • anonymous
haha @tejadab268
anonymous
  • anonymous
Do it yourself @miah now u know how to do these kind of problem , give it a try! you can do it , its simple than we think!
anonymous
  • anonymous
I still dont know how to do it
anonymous
  • anonymous
Remember \[(a+b)(a-b) = a^2 -b^2\]
anonymous
  • anonymous
Its very important as important as \[(a+b)^2 = a^2+2ab+b^2\]
anonymous
  • anonymous
|dw:1363812124287:dw|
anonymous
  • anonymous
I got it right!
anonymous
  • anonymous
as for as rationalizing problem is concerned, multiply numerator and denominator with root 2
anonymous
  • anonymous
Now one problem left, can u do it urself?
anonymous
  • anonymous
wait,.. no i didnt ?
anonymous
  • anonymous
what answer choice is that ?
anonymous
  • anonymous
wait. i did get it right (:
anonymous
  • anonymous
I need help with the third one :o
anonymous
  • anonymous
3√2/2
anonymous
  • anonymous
yes correct!

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