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= 4x² -5x² -3xy +2xy +7y -4y
= -x² -xy +3y
e. -4p² +3pq -2 -6p² +8pq -3
= -4p² -6p² +3pq +8pq -2 -3
= -10p² +11pq -5
f. 12kl -20mn -5kl -3mn
= 12 kl -5kl -20mn -3mn
= 7kl -23mn
Itu jawabannya.
= x²-xy+3y
E. -4p²+3pq-2-6p²+8pq-3 = -4p²-6p²+3pq+8pq-2-3
= -10p²+11pq-5
F. 12kl-20mn-5kl-3mn = 12kl-5kl-20mn-3mn
= 7kl-23mn