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Factorise cos²A + 3 Cos A + 2​
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Factorise cos²A + 3 Cos A + 2​

User Saeed Hassanvand
by
6.7k points

1 Answer

9 votes

Answer:


(cosA +1)(cosA +2)

Explanation:


cos^2(A)+3cos(A)+2

Which number add up to 3 and multiply to 2?

That would be 1 and 2.


cos^2(A)+3cos(A)+2=(cosA +1)(cosA +2)

User Tachyonflux
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