Find the value of the following expressi...

Find the value of the following expressions for `a=3, b=2.` (i) `a+b` (ii) `7a-4b` (iii) `a^2+2ab+b^2` (iv) `a^3-b^2`

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Solution:
a=`4`,b=`3`
(i) `3a+2b`
=> `3(4)+2(3)`
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