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5y +4z -(3y -2z)
= 5y +4z -3y +2z
= 5y -3y +4z +2z
= 2y +6z
Dibalik dahulu, sehingga :
2p -p² -(-5p² -p +3)
= 2p -p² +5p² +p -3
= 2p +p -p² +5p² -3
= 3p +4p² -3
Itu jawabannya.