1.(6p – 5q -2r) + (-8p + 6q + 9r)
2.(8x² + 4x – 21) + (6x² – 14x + 7)
3.(7a + 14) – (9a + 12)
4.(2x² + 15x – 18) – ( 11x² – 17x + 24)
5.-5(4y² – 2y + 8) – 4(7y² + 6y – 5)
30 Poin.Aljabar,mohon bantuannya.Dengan caranya, Terima Kasih.
1. (6p – 5q -2r) + (-8p + 6q + 9r)
= 6p – 8p – 5q + 6q – 2r + 9r
= -2p + q + 7r
2. (8x² + 4x – 21) + (6x² – 14x + 7)
= 8x² + 6x² + 4x – 14x – 21 + 7
= 14x² – 10x – 14
3. (7a + 14) – (9a + 12)
= 7a + 14 – 9a – 12
= 7a – 9a + 14 – 12
= -2a + 2
4. (2x² + 15x – 18) – ( 11x² – 17x + 24)
= 2x² + 15x – 18 – 11x² + 17x – 24
= 2x² – 11x² + 15x + 17x – 18 – 24
= -9x² + 32x – 42
5. -5(4y² – 2y + 8) – 4(7y² + 6y – 5)
= -20y² + 10y – 40 – 28y² – 24y + 20
= -20y² – 28y² + 10y – 24y – 40 + 20
= -48y² – 14y – 20
semoga membantu ya 🙂