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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.

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\[\left( a+b \right)^2\]
how to do this?
square of (a+b) square means multiply with itself. like square of 2 is 2*2 =4 square of a+b is (a+b)*(a+b) distribute!

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\[\left( a+b \right)^2 \] you have to write (a+b)(a+b) twice because the exponent is 2
and then use FOIL
FOIL?
first outer inner last
\[(a+b)(a+b) = (a)(a)+(a)(b)+(b)(a)+(b)(b)\]
\[(a^2)+2(ab)+(b^2)\]
|dw:1434802387781:dw|
|dw:1434802435664:dw|
oh i think i get it now.
|dw:1434802466252:dw| sorry for the rubbish handwriting lol
lawl it's okay, i'm analyzing what you wrote.
oh! I get it now! wait i will make an example to show, and you guys tell me if it's right
when I first learned it I memorized a code (1+2)(3+4) = (1)(3)+(1)(4)+(2)(3)+(2)(4) (first #)(third #)+ (first #)(fourth#)+(2nd #)(3rd #)+(2nd #)(4th #) but I don't do it anymore
one sec
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ok it's the same thing as hartnns
yeah it's correct
ok, perfect!

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