Question

1. If p(x) = 5- 4x + 2x2, find
(i) p(O),
(ii) p(3),
(iii) p(-2).​

Answer 1

p(x) = 2x² - 4x + 5

i) p(0) = 2(0)² - 4(0) + 5

= 0 - 0 + 5

= 5

ii) p(3) = 2(3)² - 4(3) + 5

= 2(9) - 12 + 5

= 18 - 12 + 5

= 6 + 5

= 11

iii) p(-2) = 2(-2)² - 4(-2) + 5

= 2(4) + 8 + 5

= 8 + 8 + 5

= 16 + 5

= 21

Hence,

p(0) = 5

p(3) = 11

p(-2) = 21