EnmaA472267 EnmaA472267
  • 03-11-2022
  • Mathematics
contestada

What is the product of -a + 3)(a + 4)?A. a 2-a + 12 B. a 2 - a - 12 C. -a 2 - a - 12 D. -a 2 - a + 12

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AndiH642757 AndiH642757
  • 03-11-2022

The given expression is : (-a +3)(a + 4)

[tex]\begin{gathered} (-a+3)(a+4)=(-a)\times(a+4)+3(a+4)_{}_{} \\ (-a+3)(a+4)=(-a)\times(a)+4\times(-a)+3\times(a)+3\times4 \\ (-a+3)(a+4)=-a^2-4a+3a+12 \\ (-a+3)(a+4)=-a^2-a+12 \end{gathered}[/tex]

Answer : D) - a² - a + 12

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