Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$( w ) b ^ { 2 } - 2 a b + a ^ { 2 }$$

Evaluate

$wb^{2}-2ab+a^{2}$

Differentiate w.r.t. w

$b^{2}$

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