1. Reducir : (x + 1)(x–1) + (x + 2)(x–2) + (x + 3)(x–3) 2. Reducir : (x + 3)(x2–3x + 9) + (x–3)(x2 + 3x + 9) 3. Reducir : (x + 1)(x + 5) + (x + 3)(x–9) 4. Reducir : (x + 1)3 + (x–1)3 – 2x3 5. Reducir : (x + 4)(x–4) – (x + 8)(x–2) almenos ayudenme con una.
En resumen
1. (x + 1)(x–1) + (x + 2)(x–2) + (x + 3)(x–3) x² - 1 + x² - 4 + x² - 9 3x² - 14. 2. (x + 3)(x2–3x + 9) + (x–3)(x2 + 3x + 9) x³ + 27 + x³ - 27 2x³ 3. (x + 1)(x + 5) + (x + 3)(x–9) x² + 6x + 5 + x² - 6x - 27 2x² - 22 4. (x + 1)3 + (x–1)3 – 2x3 3x + 3 + 3x - 3 - 2x³ 6x - 2x³ 5.
1. (x + 1)(x–1) + (x + 2)(x–2) + (x + 3)(x–3)
x² - 1 + x² - 4 + x² - 9
3x² - 14.
2. (x + 3)(x2–3x + 9) + (x–3)(x2 + 3x + 9)
x³ + 27 + x³ - 27
2x³
3.
(x + 1)(x + 5) + (x + 3)(x–9)
x² + 6x + 5 + x² - 6x - 27
2x² - 22
4.
(x + 1)3 + (x–1)3 – 2x3
3x + 3 + 3x - 3 - 2x³
6x - 2x³
5.
(x + 4)(x–4) – (x + 8)(x–2)
x² - 16 - (x² + 6x - 16)
x² - 16 - x² - 6x + 16 - 6x.
Saludos.