find the value of k if xy²k=(4xy+3y)²-(4xy - 3y)²
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R.H.S
apply formula of a^2- b^2
=(4xy+3y+4xy-3y)(4xy+3y-4xy+3y)
=8xy×6y
=48x^2y
comparing L.H.S. and R.H.S
k=48
apply formula of a^2- b^2
=(4xy+3y+4xy-3y)(4xy+3y-4xy+3y)
=8xy×6y
=48x^2y
comparing L.H.S. and R.H.S
k=48
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