Question

com conta (x-3) na 2 (2x-5) na 2 (3x-4) na 2

Answer 1

Com conta
 (x-3) na 2

(x - 3)² =
(x - 3)(x - 3) =
x.x - 3x - 3x + 3.3
  x²      - 6x    + 9 

 
 (2x-5) na 2

(2x - 5)²
(2x - 5)(2x - 5) =
2x.2x - 5.2x - 5.2x + 5.5
  4x²    - 10x - 10x   + 25
4x² - 20x + 25

 (3x-4) na 2

(3x - 4)²
(3x - 4)(3x - 4) =
3x.3x - 4.3x - 4.3x + 4.4
  9x²     -12x - 12x  + 16
9x² - 24x + 16