Question

If -1 is zero of a polynomial .p(x)=ax^3-x^2+x+4

Answer 1

Answer:

p(x)=ax^3-x^2+x+4

x=-1

so p(-1)=a×(-1)^3-(-1)^2+-1+4=a+1-1+4=a+0+4=a+4

Answer 2

Answer:

Step-by-step explanation:

p(x)=-1

ax^3-x^2+x+4

a(-1)^3-(-1)^2+(-1)+4=0

-1a-1-1+4=0

-a+2=0

-a=-2

so the sign of negative will be cancelled

a=2

the answer is 2

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