bantu yyyyyyyyyyyyyyyyyyyyua

1) (2x-5)² = 4x² - 20x + 25
2) (3x + 6)² = 9x² + 36x + 36
3) (x-6)² = x² - 12x + 36

1.)
(2x-5)^2 =
(2x-5)(2x-5) =
4x^2 - 10x - 10x + 25 =
4x^2 - 20x + 25

2.)
(3x+6)^2 =
(3x+6)(3x+6) =
9x^2 + 18x + 18x + 36 =
9x^2 + 36x + 36

3.)
(x-6)^2 =
(x-6)(x-6) =
x^2 -6x - 6x + 36 =
x^2 - 12x + 36

#semoga membantu...