Answer:
-11
Step-by-step explanation:
The given expression is:
[tex]|-4b-8|+|-1-b^2|+2b^3[/tex]
=[tex]|-(4b+8)|+|-(1+b^2)|+2b^3[/tex]
=[tex]4b+8+1+b^2+2b^3[/tex]
=[tex]4b+9+b^2+2b^3[/tex]
Substituting the value of b=-2 in above expression, we get
=[tex]4(-2)+9+(-2)^2+2(-2)^3[/tex]
=[tex]-8+9+4-16[/tex]
=[tex]-11[/tex]
Thus, the value of the given expression is -11.
Answer:
The value of expression at b= -2 is -11
Step-by-step explanation:
Given: Expression = [tex]\left |-4b-8\right |+\left | -1-b^2\right |+2b^3[/tex]
To find: Value of given expression when b = -2
Expression
[tex]\left |-4b-8\right |+\left | -1-b^2\right |+2b^3[/tex]
Put, b = -2 in above expression. we get
⇒[tex]\left |-4\times(-2)-8\right |+\left | -1-(-2)^2\right |+2(-2)^3[/tex]
⇒[tex]\left |8-8\right |+\left | -1-4\right |+2\times(-8)[/tex]
⇒[tex]\left |0\right |+\left | -5\right |+(-16)[/tex]
⇒[tex]0+5-16[/tex]
⇒ -11
Therefore, The value of expression at b= -2 is -11
