Penyelesaian:
a. (5x - 9) - (7x + 15y) = 5x - 9 - 7x - 15y
= 5x – 7x – 15y – 9
= -2x – 15y – 9
b. (5y − 3x − 4) - (5x − 3y + 7)
= 5y – 3x – 4 – 5x + 3y - 7
= -3x – 5x + 5y + 3y – 4 – 7
= -8x + 8y – 11
c. (5x2 − 9xy − 4y2) - (−x2 − 6xy + 3y2)
Penyelesaian:
a. (5x - 9) - (7x + 15y) = 5x - 9 - 7x - 15y
= 5x – 7x – 15y – 9
= -2x – 15y – 9
b. (5y − 3x − 4) - (5x − 3y + 7)
= 5y – 3x – 4 – 5x + 3y - 7
= -3x – 5x + 5y + 3y – 4 – 7
= -8x + 8y – 11
c. (5x2 − 9xy − 4y2) - (−x2 − 6xy + 3y2)
Editor: Suci Annisa Caroline
Sumber: buku.kemdikbud.go.id