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09-10-2018
Mathematics

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evaluate the expression for the given value of the variuble with step by step explanation
-4b-8 + -1-b^2 +2b^3 b=-2

Respuesta :

12-10-2018

Substitute the value of b = -2 to the expression

[tex]-4b-8+(-1)-b^2+2b^3=2b^3-b^2-4b-8-1=2b^3-b^2-4b-9\\\\2(-2)^3-(-2)^2-4(-2)-9=2(-8)-4+8-9=-16-4+8-9=-21[/tex]

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