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a. -3 (5x+2) = -15x-6
b. -(4a-6b) = -4a+6b
c. -5(x^^+4x-5) = -5x^^- 20x + 25
d. x(2x+3xy-5x^^) = 2x^^+ 3 x^^y -5 x^^^
^^ = pangkat dua
^^^ = pangkat tiga