Question

Fatorar a expressao x²-4 (x+2) (-2) x²-9 (x+3). (x-3)

Answer 1

x² - 4 (x + 2) (-2) x² - 9 (x + 3) . (x - 3)

x² - 4 (2x) (-2) x² - 9 (3x) . (3x)

x² - 4 + 2x -2 + x² - 9 + 9x

x² + x² + 2x + 9x - 4 - 2 - 9

2x² + 11x - 15