a) a3-a2-10a-8=a3-a2-2a2-2a-8a-8=a2a+1-2aa+1-8a+1=a+1a2-2a-8=a+1a2-4a+2a-8=a+1 aa-4+2a-4=a+1a+2a-4
b) 3x2-x-14=3x2+6x-7x-14=3xx+6-7x+6=3x-7x+6
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