if (x-1) is factor of x3-ax2+7, then a=
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Step-by-step explanation:
put x=1
3x-ax+7=0
3×1-a×1×2+7=0
3-2a+7=0
3-2a=-7
-2a=-7-3= -10
a=-10/-3
a= 10/3
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