How do you simplify $2 {cos}^{2} x + cos x - 3$ $2cos^2x + cosx -3$ ?

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How do you simplify $2 {cos}^{2} x + cos x - 3$ $2cos^2x + cosx -3$ ?

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Answer 1 · 2015-11-13T05:22:58

Simplify f(x) = 2cos^2 x + cos x - 3

f(x) = (cos x - 1)(2cos x + 3)

Explanation:

$f (x) = 2 {cos}^{2} x + cos x - 3 .$ $f(x) = 2cos^2 x + cos x - 3.$
Since a + b + c = 0, the 2 factors are: $(cos x - 1)$ $(cos x - 1)$ and
$(cos x + \frac{c}{a}) = (cos x + \frac{3}{2})$ $(cos x + c/a) = (cos x + 3/2)$
f(x) = (cos x - 1)(2cos x + 3)

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How do you simplify $2 {cos}^{2} x + cos x - 3$ $2cos^2x + cosx -3$ ?

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How do you simplify $2 {cos}^{2} x + cos x - 3$ $2cos^2x + cosx -3$ ?