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Mathematics 14 Online
OpenStudy (anonymous):

Find the solutions of the given equation in the indicated interval. 20 (cos(x))^2 + cos(x) − 1 = 0, [0, π]

OpenStudy (freckles):

you can factor

OpenStudy (freckles):

20u^2+u-1 what two numbers multiply to be -20 and add up to be 1?

OpenStudy (anonymous):

-4 and 5

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