Tolong dong buat besok…
1) b. 4x – y – 8 + 6x + 5y – 2
= 10x + 4y – 10
c. 2m² + 6m + 2 + 6m² – 2m + 4
= 8m² + 4m + 6
d. -2p³ + 3p² – 4p + 2p³ – 3p² + 4p
= 0
e. 9(x² + 4) + 7xy + yx + 4(x² + 5)
= 9x² + 36 + 7xy + xy + 4x² + 20
= 13x² + 8xy + 56
f. 3(4p + 3q) – 5p² + 2p – 7p² + 5q
= 12p + 9q – 5p² + 2p – 7p² + 5q
= -12p² + 14p + 14q
2) a. (x – y) – (4x + 6y)
= x – y – 4x – 6y
= -3x – 7y
b. (2s – r) – (6r – 3s)
= 2s – r – 6r + 3s
= -7r + 5s
c. (6m² + 2m + 4) – (9m² + 6m + 2)
= 6m² + 2m + 4 – 9m² – 6m – 2
= -3m² – 4m + 2
d. (6 – m²) – (m² + m – 4)
= 6 – m² – m² – m + 4
= -2m² – m + 10
f. p(2 + q) + 6p – [2(3p + 5q) – 4pq]
= 2p + 2q + 6p – [6p + 10q – 4pq]
= 8p + 2q – 6p – 10q + 4pq
= 2p – 8q + 4pq