Question

If p(x)= x³- x²+ 3x+ 1 ; then find the value of p(1) and p(-1)​

Answer 1

Answer:

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Answer 2

Given :

Given that, p(x) = x³ - x² + 3x + 1.

To find :

We should find the value of p(x) when p(1) and p(-1).

Solution :

Substituting p(1) in p(x) = x³ - x² + 3x + 1:

• x³ - x² + 3x + 1
• (1)³ - (1)² + 3(1) + 1
• 1 - 1 + 3 + 1
• 0 + 3 + 1
• 4

Substituting p(-1) in p(x) = x³ - x² + 3x + 1

• x³ - x² + 3x + 1
• (-1)³ - (-1)² + 3(-1) + 1
• -1 - (1) - 3 + 1
• - 1 - 1 - 3 + 1
• 0 - 1 - 3
• - 4

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Therefore, the values of p(x)=x³-x²+3x+1 when p(1) and p(-1) are 4 and -4 respectively.