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a) 2a -b +(-5a+3b)
2a -b - 5a+3b
2a -5a -b+3b
3a -2b
b) p²+3p+2 + (-3 p²-5p+2) p² +3p +2 - 3p² - 5p +2
p²-3p² +3p- 5p +2+2
2p² - 2p +4
penguranga
a) x + 3y dri -2x-4y
jwb: -2x-4y - x + 3y
-2x-x -4y+3y
3x - y
b) 2a +3 dari -a-5
jwb: -a-2a - 5+3
-3a -2
perkalian
a) soalnya gk keliatan
b) (5+x) (3-2x)
15-10x+3x-2x²
15- 7x - 2x²