Jawaban:

Kakak bantu jawab ya dek :)

1. 3 (4a + 5) = 3.4a + 3.5 = 12a + 15

2. 5 (2b - 4c) = 5.2b + 5.(-4c) = 10b - 20c

3. -2(3y + 2z) = -2.3y + (-2).2z = -6y - 4z

4. (a + 3) ( 2b + 4) = a.2b + a.4 + 3.2b + 3.4 = 2ab + 4a + 6b + 12

5. (3m - 1) (4n + 2) = 3m.4n + 3m.2 - 1.4n - 1.2 = 12mn + 6m - 4n - 2

6. (5p - 2) ( q + 6) = 5p.q + 5p.6 - 2.q - 2.6 = 5pq + 30p - 2q - 12

7. (a + b)² = (a + b) (a + b) = a.a + a.b + a.b +b.b = a² + 2ab + b²

8. (2y - 3) 3 = 2y.3 - 3.3 = 6y - 9

9. (x + 3) (2x - 1) = x.2x + x.(-1) + 3.2x + 3.(-1) = 2x² - x + 6x - 3 = 2x² + 5x - 3

10. (p - 3q) (p + q) = p.p + p.q - 3q.p - 3q.q = p² + pq - 3pq - q² = p² - 2pq - q²

Semoga bermanfaat yaa

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