Question

3. Efectúa: (x2 – x + 5)(x2 – x + 7) – (x2 – x + 6)²

Answer 1

(x2 – x + 5)(x2 – x + 7) – (x2 – x + 6)² =

(x4  - x3 +7χ² -X3 + χ² - 7X +5χ² - 5X + 35 ) - (X4 + χ² + 36 - 2.x3 -12x +12χ²)

x4  - x3 +7χ² -X3 + χ² - 7X +5χ² - 5X + 35  -X4 - χ² - 36 + 2.x3 +12x -12χ²=

-1

♥ exitos♥