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Expand each of the following: (i)(3x+4y)...

Expand each of the following: (i)`(3x+4y)^2` (ii) `(3x-4y)^2`

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(i)`(3x+4y)^2=(3x)^2+(4y)^2+2xx(3x)xx4y`
=`9x^2+16y^2+24xy`
(ii) `(3x-4y)^2=(3x)^2+(4y)^2-2xx(3x)xx4y`
=`9x^2+16y^2-24xy`
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