answer 10 and 12 questions fast as u can
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7x+6y+z +{-9x+3y-2z}
=7x+6y+z-9x+3y-2z
=-2x+9y-z is the sum of the polynomials it should be subtracted from
16x-11y+2z
so -2x+9y-z - {16x-11y+2z}
-2x+9y-z-16x+11y-2z
=-18x+20y-3z
=7x+6y+z-9x+3y-2z
=-2x+9y-z is the sum of the polynomials it should be subtracted from
16x-11y+2z
so -2x+9y-z - {16x-11y+2z}
-2x+9y-z-16x+11y-2z
=-18x+20y-3z
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