Question

please answer this question if u know only​

Answer 1

Step-by-step explanation:

$\sf Yes\:we \:can \:expand \:{ ( B - A ) }^{2}$

$\sf It\:is\:expanded\: {A}^2 + {B}^2 - AB - BA$

$\sf Note\:that\:AB\:and\:BA \:may\:or\:may\:not\:be\:same$

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Answer 2

|A-B|^2=A^2+B^2-AB-BA

I hope my answer helps you