Evaluate the expression for the given value of the variable(s)
[-4b-8]+[-1-b^2]+2b^3; b=-2
Sure, let's evaluate the expression [-4b-8]+[-1-b^2]+2b^3 when b=-2.
First, let's substitute b with -2 in each term:
[-4(-2) - 8] + [-1 - (-2)^2] + 2(-2)^3
Simplifying each term, we get:
[8 - 8] + [-1 - 4] + 2(-8)
Now, let's simplify further:
[0] + [-5] + (-16)
Finally, let's add everything up:
0 + (-5) + (-16) = -21
So, when b is equal to -2, the expression [-4b-8]+[-1-b^2]+2b^3 evaluates to -21.
To evaluate the expression [-4b-8]+[-1-b^2]+2b^3 when b=-2, substitute -2 in place of b in the expression and simplify.
First, we substitute -2 for b in each term:
[-4(-2)-8]+[-1-(-2)^2]+2(-2)^3
Simplifying each term:
[-8-8]+[-1-4]+2(-8)
Now, we calculate the result:
[-16]+[-5]+(-16)
Next, we combine like terms:
-16-5-16
Finally, we calculate the final result:
-37
To evaluate the expression [-4b - 8] + [-1 - b^2] + 2b^3 when b is equal to -2, we need to substitute -2 for b in the expression and simplify the result.
Step 1: Substitute -2 for b in each term of the expression:
[-4(-2) - 8] + [-1 - (-2)^2] + 2(-2)^3
Step 2: Simplify each term within brackets:
[8 - 8] + [-1 - 4] + 2(-8)
Step 3: Simplify the remaining multiplication:
[0] + [-5] + (-16)
Step 4: Add all the terms together:
0 - 5 - 16
Step 5: Finally, perform the subtraction:
-21
Therefore, the result of the expression [-4b - 8] + [-1 - b^2] + 2b^3 when b is equal to -2 is -21.