What is the value of this expression when m =-3 given $2 m^{5} - 3 m^{3} + 12$ $2m^5-3m^3 + 12$ ?

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What is the value of this expression when m =-3 given $2 m^{5} - 3 m^{3} + 12$ $2m^5-3m^3 + 12$ ?

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Answer 1 · 2018-07-02T09:32:48

$- 393$ $-393$

Explanation:

$substitute m = - 3 into the expression$ $"substitute "m=-3" into the expression"$

$= 2 \times {(- 3)}^{5} - 3 \times {(- 3)}^{3} + 12$ $=2xx(color(red)(-3))^5-3xx(color(red)(-3))^3+12$

$= (2 \times - 243) - (3 \times - 27) + 12$ $=(2xx-243)-(3xx-27)+12$

$= - 486 - (- 81) + 12$ $=-486-(-81)+12$

$= - 486 + 81 + 12 = - 393$ $=-486+81+12=-393$

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What is the value of this expression when m =-3 given $2 m^{5} - 3 m^{3} + 12$ $2m^5-3m^3 + 12$ ?

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Explanation:

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What is the value of this expression when m =-3 given $2 m^{5} - 3 m^{3} + 12$ $2m^5-3m^3 + 12$ ?