What is the product of (-a + 3)(a + 4)

Step-by-step explanation:

⇒(-a + 3)(a + 4)

⇒-a(a + 4) + 3(a + 4)

⇒(-a)(a) + (-a)(4) + (3)(a) + (3)(4)

⇒-a² - 4a + 3a + 12

⇒-a² - a + 12

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