examine if x-7 is a factor of x³+2x²-3x+4x
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Answer:
x-7=0
X=7
put the value of X in the equation x³+2x²-3x+4x
(7)³+2(7)²-3×7+4×7
343+2×49-21+28
343+98-21+28
441+7=448
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