Răspuns :

Răspuns:

= (3 - 2x)(3-2x) + 5x²

= (3 - 2x)¹+¹ + 5x²

= (3 - 2x)² + 5x²

= 3² - 2 • 3 • 2x + (2x)² + 5x²

= 9 - 2 • 3 • 2x + (2x)² + 5x²

= 9 - 12x + 4x² + 5x²

= 9 - 12x + (4 + 5)x²

= 9 - 12x + 9x²

= 9x² - 12x + 9