👤

Sagot :

Bonjour,

A(x) = x³ + 4x² -7x - 9

a) A(3) = 3³ + 4 × 3² - 7 × 3 - 9

A(3) = 27 + 36 - 21 - 9

A(3) = 27 + 6

A(3) = 33

b) A(-1) = (-1)³ + 4 × (-1)² - 7 × (-1) - 9

A(-1) = -1 + 4 + 7 - 9

A(-1) = 11 - 10

A(-1) = 1

© 2024 IDNLearn. All rights reserved.