Dengan Sifat Distributif! bantu Gannn 1 .(3x-y) (x+y) : 2.(5m-1) (m+4) 3.(a-4) (2a+3)

1. (3x - y) (x + y)
= 3x^2 + 3xy - xy - y^2
= 3x^2 + 2xy - y^2

2. (5m - 1) (m + 4)
= 5m^2 + 20m - m - 4
= 5m^2 + 19m - 4

3. a + 2a - 4 + 3
= 3a^2 - 1

1. 3x² + 3xy - xy - y²
= 3x² + 2 xy - y²

2. 5 m² + 20 m - m - 4
= 5 m² + 19 m - 4

3. 2a² + 3a - 8 a - 12
= 2 a² + 8 a - 3 a - 12
= 2 a² + 5 a - 12

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