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Using the Identity (I), find (i) (2x+3y...

Using the Identity (I), find (i) `(2x+3y)^2` (ii) `103^2`

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(i) `(2x+3y)^2`
using identity, `(a+b)^2=a^2+b^2+2ab`
`=(2x)^2+(3y)^2+2(2x)(3y)`
`=4x^2+9y^2+12xy`
(ii) `103^2`
We can write, `103=100+3`
`(100+3)^2`
`=(100)^2+(3)^2+2(100)(3)`
...
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