7. Add the following: (a) -x + 2xy,-4x2 + 3xy and 5x?-8xy x² (b) 2p?q?-3pq+4,5+7pq-3p?q? (c) 3x-6y +22,-4x+3z + 8y, 72-8y-3x (d) 3x - 4x+2,-38-2+x-3x+28 +6
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simple question try on your own Freind
that is correct one
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