Respuesta :

Answer:

x² - x - 12

Step-by-step explanation:

(x + 3)(x - 4)

Each term in the second factor is multiplied by each term in the first factor , that is

x(x - 4) + 3(x - 4) ← distribute parenthesis

= x² - 4x + 3x - 12 ← collect like terms

= x² - x - 12

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