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a.2(2x-5) = 4x - 10
b.4(2x² - 3x) = 8x² - 12x
c.-5(2x+4y-3z) = -10x - 20y + 15z
d.12m(-4x+3y-5z) = -48mx + 36my - 60mz
2. jika a=-2,b=3 dan c=5
a.6(a+b+c) = 6(-2 + 3 + 5) = 6(5) = 30
b.3(2a-b+3c) = 3(2.(-2) - 3 + 3.5) = 3(-4 - 3 + 15) = 3(8) = 24
c.4(5a+3b-2c) = 4(5.(-2) + 3.3 - 2.5) = 4(-10 + 9 - 10) = 4(-11) = -44
d.-5(4a-2b-c) = -5(4.(-2) - 2.3 - 5) = -5(-8 - 6 - 5) = -5(-19) = 95