Question

a) (3 + 5x)² 
b) (2x - 3)² 
c) ( c - d)² 

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Answer 1

a) 9+30x+25x²
b) 4x²-12x+9
c) c²-2cd+d²

Answer 2

Resposta:

a)(3 + 5x)² 

(5x + 3)²

(5x + 3) (5x + 3)

5x (5x + 3) + 3 (5x + 3)

25x² + 15x + 3 (5x + 3)

25x² + 15x + 15x + 9

25x² + 30x + 9

b)(2x - 3)² 

(2x - 3) (2x -3)

2x (2x -3) -3 (2x -3)

4x² - 6x -3 (2x -3)

4x² - 6x - 6x + 9

4x² - 12x + 9

C)( c - d)² 

c²  + 2cd + d²