subtract: -11x^2y^2 +7xy - 6 from 9x^2y^2 - 6xy +9
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step - by - step explanation :
-11x×2y×2 +7xy-6
= -44xy + 7xy-6
=-37xy-6.....(1).
9x×2y×2-6xy+9
= 36xy-6xy+9
= 30xy+9
now subtracting eq.1 from eq.2 .
= 30xy+9-(37xy-6)
=30xy +9+37xy+6
= 67xy+15 ans.
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