Question

5 ejemplos de binomios al cuadrado

Answer 1

1(x + 2)3 = x3 + 3 · x2 · 2 + 3 · x · 22 + 23 = = x3 + 6x2 + 12x + 8.
2(3x − 2)3 = (3x)3 − 3 · (3x)2 · 2 + 3 · 3x · 22 − 23 = = 27x 3 − 54x2 + 36x − 8.
3(2x + 5)3 = (2x)3 + 3 · (2x)2 ·5 + 3 · 2x · 52 + 53 = = 8x3 + 60 x2 + 150 x + 125.

(a - b)2 = (a - b)(a - b)
(a - b)2 = aa + (a)(-b) + (-b)(a) + (-b)(-b)