Question

simplificati frățiile ​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

25x^2 - 1 = (5x - 1)(5x + 1)

(5x - 1)(5x + 1) / (5x + 1) = 5x - 1

___________

b)

49x^2 - 1 = (7x - 1)(7x + 1)

(7x + 1) / (7x - 1)(7x + 1) = 1 / (7x - 1)

_________

c)

36x^2 - 121 = (6x - 11)(6x + 11)

36x^2 + 132x +121 = (6x + 11)^2

(6x - 11)(6x + 11) /  (6x + 11)^2 = (6x - 11) / (6x + 11)

___________

d)

4x^2 + 32x + 64 = (2x + 8)^2

4x^2 - 64 = (2x + 8)(2x - 8)

(2x + 8)^2 /  (2x + 8)(2x - 8) = (2x + 8)/(2x - 8)