Question
Subtract:
$-11 x^2 y^2+7 x y-6 \text { from } 9 x^2 y^2-6 x y+9$
$-11 x^2 y^2+7 x y-6 \text { from } 9 x^2 y^2-6 x y+9$
✓
Answer
$-11 x^2 y^2+7 x y-6$ from $9 x^2 y^2-6 x y+9$
$ =9 x^2 y^2-6 x y+9-\left(-11 x^2 y^2+7 x y-6\right) $
$ =9 x^2 y^2-6 x y+9+11 x^2 y^2-7 x y+6 $
$ =20 x^2 y^2-13 x y+15 $
$ =15-13 x y+20 x^2 y^2 $
$ =20 x^2 y^2-13 x y+15$
$ =9 x^2 y^2-6 x y+9-\left(-11 x^2 y^2+7 x y-6\right) $
$ =9 x^2 y^2-6 x y+9+11 x^2 y^2-7 x y+6 $
$ =20 x^2 y^2-13 x y+15 $
$ =15-13 x y+20 x^2 y^2 $
$ =20 x^2 y^2-13 x y+15$
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