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a)4a-32
b)3,6x-1.2y-0,6
c)-5/7x+5/7y+1/7
d)5x*2-10x-25
e)-4,5xy-0,5x+1,5xy
f)4/9a*2+2/9b*2-1/9
g)3/5a*3bc-2/25a*2c+0,2a*2b
h)-0,25x*2y-0,75xy*2-1,5x*3y
i)i8a*5-2a*3-4a-2a*2+6a*4
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a) 4a-32 = 4(a-8)
b) 3,6x-1,2y-0,6 = 0,6(6x-2y-1)
c) -5/7x+5/7y+1/7 = 1/7(-5x+5y+1)
d) 5x²-10x-25 = 5(x²-2x-5)
e)-4,5xy-0,5x+1,5xy = 0,5x(-9y-1+3y) = 0,5x(-6y-1)
f)4/9a²+2/9b²-1/9 = 1/9(4a²+2b²-1)