alyxxboothe alyxxboothe

18-02-2019
Mathematics

contestada

PLEASE HELPPPPP!!!!!!!!
Factor completely 21x3 + 35x2 + 9x + 15.

(3x − 5)(7x2 − 3)
(3x − 5)(7x2 + 3)
(3x + 5)(7x2 − 3)
(3x + 5)(7x2 + 3)

Respuesta :

nguyenviethoangbm9z nguyenviethoangbm9z

18-02-2019

Answer:

is so easy: (3x + 5)(7x² + 3)

Step-by-step explanation:

1. 7x² × (3x + 5) + 9x + 15

2. 7x² × (3x + 5) + 3(3x + 5)

3. (3x + 5) × (7x² + 3)

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