Question

im doing an EOC review an i need help doing a certain problem. What is the Value of this expression when a=64 and b=-5 and i cant type the problem because it has a square root and i dont know hwo to type it on

Answer 1

\[-2\sqrt[3]{64-5^2}\]

Answer 2

and ik the answer is 17

Answer 3

but im not looking for the final solution

Answer 4

my choices are
\[-2\sqrt[3]{89}\]
\[-2\sqrt[2]{89}\]
\[-2\sqrt[2]{39}\]
\[-2\sqrt[3]{39}\]

Answer 5

what's the original expression ?

Answer 6

the fist expression i typed

Answer 7

\(\color{blue}{\text{Originally Posted by}}\) @Kenttopia2015
\[-2\sqrt[3]{64-5^2}\]
\(\color{blue}{\text{End of Quote}}\)
b is -5 so you should put the parentheses \[-2\sqrt[3]{64-(-5)^2}\]

Answer 8

sorry

Answer 9

didnt think

Answer 10

is there a plus or negative sign between a and b ???

Answer 11

i currently dont have a calculator that is able to solve an expression like that

Answer 12

negative sign

Answer 13

wait

Answer 14

okay all you need to do is take the the square of 5 and then subtract

Answer 15

im sorry there is a plus

Answer 16

can you take a screen shot please

Answer 17

its on an ipad

Answer 18

\[\rm -2\sqrt{a+b^2}\] is this your question ?

Answer 19

yeah

Answer 20

wait

Answer 21

its cubed to the right if the square root

Answer 22

i mean left

Answer 23

god why am i so confused about this

Answer 24

ohh yeah sorry

Answer 25

\[\large\rm -2 \sqrt[3]{a+b^2}\]
replace a with 64
and `b` with -5

Answer 26

yeah
and you get \[-2\sqrt[3]{64+(-5)}\]

Answer 27

yes don't forget the square yeah
\[-2\sqrt[3]{64+(-5)^2}\]
take the square (-5)^2= ??

Answer 28

oh sorry

Answer 29

25

Answer 30

right
\[-2\sqrt[3]{64+25}\]
now just add 64+25

Answer 31

89

Answer 32

ohhhhhh

Answer 33

thank you so very much

Answer 34

np

Answer 35

does the cube stay to the left of the square root?

Answer 36

nvm

Answer 37

thanks

Answer 38

after looking at the choices i think we don't have to do anything with cube root