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what is (a+b)*(c+d) ?

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Other answers:

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

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