check whether 7+ 3x is a factor of 3xcube + 7x
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Answer:
Step-by-step explanation:
=7+3x
= 3x = -7
= x = -7/3
Now put in equation
3x³-7x
=3(-7/3)-7(-7/3)
=-7+49/3
= -21 +49
= 28
No it is not a factor
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