x cube + 7 x square + 2 X - 40
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Answer:
0
Step-by-step explanation:
substitute substitute 2 and simplify expression
x cube + 7 x square + 2 x - 40 is equal to zero
show root 2 of polynomial
=2 cube + 7 into 2 square + 2 into 2 - 40
= 8+7x4+4-40
=40-40
=0
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