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First problem

Factor by grouping

(x³ + 2x²) - (x - 2) 
the sign will change
(x³+2x²) - (x+2)
factor again
x²(x+2)- (x+2)

(x²-1) (x+2)

difference of two squares


0 0 0
Second problem are difference of two squares and difference of two cubes... They're already factored...
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