Question

Show that -1 is a zero of the polynomial
$2 {x}^{3} - {x}^{2} + x + 4$
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Answer 1

Answer:

2(-1) - 1 - 1 +4 =0

Just put the given value in place of x..

If answer comes to zero..

Then it is the zero of given polynomial

Answer 2

Step-by-step explanation:

All you have to do is to put -1 in the given eqn.

2(-1)³-(-1)²-1+4=0

This shows -1 is a zero of the given polynomial

Hope it helps :)