Question

Evaluate the following expression using the values given:

Find -3a2 - b3 + 3c2 - 2b3 if a = 2, b = -1, and c = 3.

Numerical Answers Expected!

Answer 1

Can you plug in the values of a,b and c into the equation and see what you get. If you don't know then I'll help you.

Answer 2

@shelbylynn

Answer 3

Ok Lets first plug in a=2
So it will become -3(2)^2-b^3=3c^2-2b^3
which equals to -3(4)-b^3+3c^2-2b^3

Answer 4

Now lets plug in b=-1
It will become -12-(-1)^3+3c^2-2(-1)^3
-1^3=-1x-1x-1=-1
So -12-(-1)+3c^2-2(-1)
which equals to -12+1+3c^2+2
this equals to -9+3c^2

Answer 5

Now plug in c=3
-9+3(3)^2
this equals to -9+3(9)
which finally eqauls -9+27=18

Answer 6

So your final answer is 18.

Answer 7

@shelbylynn If you respond then I can assist you better.

Answer 8

lol i was just cheking your math lol