6- Fatore as seguintes expressões:
a) ay+by:
b) 5b+b
c) 12x²y-16xy
d) ax-3x + 2a-6
e) 2x-5xy + 14-35y
f) x+3x²+x+3
g) 3x² + 6x-3xy-6y

7- Reduza as expressões a seguir e encontre as equações equivalentes.
a) 5x² + 7x= 3x² + 2x
b) X² + 6x = 5 + 3x
c) (2x-3) (x+4) - 8x = 10
d) (x-4)²= 2x (1-x)
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