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Find the product of $ab(a+b)$ and evaluate it for a=2 and b=1.
 Given:
The value of a=2 and b =1.
To find:
The product $ab(a+ b)$
Solution:
$ab \times (a+ b)$ ; a = 2 ; b = 1
Substitute a = 2 ; b = 1 in  $ab\times (a+b)$
$ab \times (a+ b) = 2 \times 1 \times (2 + 1)$
= 2 $\times$ (3) = 6
$ ab \times(a+ b) = 6$.
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