👤

Sagot :

ECTO220

Réponse :

Bonjour

1) A(x) = 2×(x+5)×x + 2(x-3)(x+5) + 2×x(x-3)

A(x) = 2(x² + 5x) + 2(x² + 2x - 15) + 2(x² - 3x)

A(x) = 2x² + 10x + 2x² + 4x - 30 + 2x² - 6x

A(x) = 6x² + 8x -30

2) A(4,5) =6×4,5² + 8×4,5 - 30 = 121,5 + 36 - 30 = 127,5 cm²

Other Questions

© 2024 IDNLearn. All rights reserved.