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B.3x-6-2x+3=3x-2x-6+3=x-9
C pusing aku
= 2x + 3 + 3x - 6
= 2x + 3x + 3 - 6
= 5x - 3
b) B - A
= 3x - 6 - 2x + 3
= 3x - 2x - 6 + 3
= x - 3
c) A x B
=( 2x + 3 ) ( 3x - 6 )
= 6x² - 12x + 9x - 18
= 6x² - 3x - 18