Question

find the value of the polynomial p(x) at x=-1 p(x)=2x3 + 6x2 + 5x -3​

Answer 1

Answer:

p(x)=2x3+6x2+5x-3

p(x)=2x3+6x2+5x-3p(-1)=2×(-1)3+6(-1)2+5(-1)3

p(x)=2x3+6x2+5x-3p(-1)=2×(-1)3+6(-1)2+5(-1)3=(-6)+(-12)+(-15)

p(x)=2x3+6x2+5x-3p(-1)=2×(-1)3+6(-1)2+5(-1)3=(-6)+(-12)+(-15)=-33

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Answer 2

Answer:

Step-by-step explanation:GIVEN:x=-1

and p(x)=2x3+6x2+5x-3

    substitute x=-1 in p(x)

now,

       p(x)=2x3+6x2+5(-1)-3

             =6+12+-5-3

             =6+12-5-3

             =18-8

             =10

hence,the answer is 10.

hope it helps you