Question

HELP PLEASE!!!

Evaluate the following expression using the values given:

Find -a^2 - 3b^3 + c^2 + 2b^3 - c^2 if a = 3, b = 2, and c = -3.

-67

-17

-31

1

Answer 1

just plug in a b and c into the equation and u should find your answer

Answer 2

yes i know that i did that and i keep coming up with the same answer and it was wrong

Answer 3

@jim_thompson5910

Answer 4

after you make the proper substitutions, you should have this

-a^2 - 3b^3 + c^2 + 2b^3 - c^2

-(3)^2 - 3(2)^3 + (-3)^2 + 2(2)^3 - (-3)^2

Answer 5

You would then evaluate -(3)^2 - 3(2)^3 + (-3)^2 + 2(2)^3 - (-3)^2 using PEMDAS

Answer 6

tell me what you get

Answer 7

9 - 24 + 9 + 16 - 9 = 1 which is the wrong answer

Answer 8

@jim_thompson5910

Answer 9

you made an error on the first term

-(3)^2 turns into -9 and not +9

Answer 10

you should have this

-9 - 24 + 9 + 16 - 9

Answer 11

how did u get -9

Answer 12

at the very left is -a^2

plug in a = 3

-a^2 = -(3)^2 = -9

Answer 13

OOOOOOOOOOOOOOOOOOhhhhhhhhh now i see my mistake

Answer 14

THANK YOU YOU THE BEST!!! :D

Answer 15

you're welcome