question_answer 4)

                (a) Subtract \[4a-7ab+3b+12\] from \[12a-9ab+5b-3\] (b) Subtract \[3xy+5yz-7zx\] from \[5xy-2yz-2zx+10xyz\] (c) Subtract \[4{{p}^{2}}q-3pq+5p{{q}^{2}}-8p+7p-10\] from \[18-3p-11q+5pq+2p{{q}^{2}}+5{{p}^{2}}q\].

Answer:

                (a)                

	\[12a-9ab+5b-3\]
?	\[4a-7ab+4b+12\]
	?	+	?	?
\[8a-2ab+2b-15\]

                (b)                

	\[5xy-2yz-2zx+10xyz\]
?	\[3xy+5yz-7zx\]
	?	?	+
\[2xy-7yz+5zx+10xyz\]

(c)                

	\[18-3p-11q+5pq-2p{{q}^{2}}+5{{p}^{2}}q\]
?	\[-10-8p+7q-3pq+5p{{q}^{2}}+4{{p}^{2}}q\]
	+	+	?	+	?	?
\[28+5p-18q+8pq-7p{{q}^{2}}+{{p}^{2}}q\]