bhramanb
bhramanb bhramanb
  • 10-01-2021
  • Mathematics
contestada

factorise cos²A + 3 Cos A + 2​

Respuesta :

GrandNecro
GrandNecro GrandNecro
  • 10-01-2021

Answer:

[tex](cosA +1)(cosA +2)[/tex]

Step-by-step explanation:

[tex]cos^2(A)+3cos(A)+2[/tex]

Which number add up to 3 and multiply to 2?

That would be 1 and 2.

[tex]cos^2(A)+3cos(A)+2=(cosA +1)(cosA +2)[/tex]

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