Question

1. Find p(0), p(1) and p(-1) for the polynomial :
p(x)=5xcube-2xsquare+ 3x +2.​

Answer 1

P(x) = 5x³ - 2x² + 3x + 2

• P(0) = 5 x (0)³ - 2 x (0)² + 3 x 0 + 2

0 - 0 + 0 + 2 = 2

• P(1) = 5(1)³ - 2(1)² + 3 x 1 + 2

5 - 2 + 3 + 2 = 8

• P(-1) = 5(-1)³ - 2(-1)² + 3 x -1 + 2

- 5 - 2 - 3 + 2 = - 8

Answer 2

Answer:

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P(x) = 5x³ - 2x² + 3x + 2

• P(0) = 5 x (0)³ - 2 x (0)² + 3 x 0 + 2

0 - 0 + 0 + 2 = 2

• P(1) = 5(1)³ - 2(1)² + 3 x 1 + 2

5 - 2 + 3 + 2 = 8

• P(-1) = 5(-1)³ - 2(-1)² + 3 x -1 + 2

- 5 - 2 - 3 + 2

= - 8