2 years ago

Find the value of x^3+x^2-3x when x=-2

1 answer:

5 0

Answer:

-6

Step-by-step explanation:

Substitute -2 from x meaning -2^3+-2^2-3*-2; solve this, you get -6!

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Ipatiy [6.2K]

Answer:

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Step-by-step explanation:

sin (theta) = 2/5

(sin (theta))^2 = 4/25

4/25 + (cos (theta))^2 = 1

(cos (theta))^2 = 1 - 4/25 = 21/25

cos (theta) = √21/5

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