Question

(x-1)(x+1)
(x-4)(x+4)
(2x-1)(2x+1)
(3x-5)(5+3x)
​

Answer 1

x^2-1

x^2-16

4*x^2-1

9*x^2-25

(am notat cu x^2 -  x la puterea a 2 a)

sper ca te am ajutat.

Answer 2

Răspuns:

1. ( x-1 )( x+1) = x²-1

2. x² - 4² = x² - 16

3. (2x)² - 1² = 4x² -1

4. (3x)² - 5² = 9x² -25