Question

If a = -7, what is 3-2(4+a)³ ?

Answer 1

substitute a for -7

Answer 2

Yeah I did that

Answer 3

so what did you get ?

Answer 4

Do I have to add what's inside the parenthesis when I substitute the -7 in ? @Nnesha

Answer 5

yes right
PEMDAs rule first solve whats in the parentheses and then take cube

Answer 6

Kk

Answer 7

Okay so I did that and I got -3

Answer 8

is it 3-2 front of the parentheses ?

Answer 9

4-7=-3
(-3)^3 <--solve that

Answer 10

Wait no the 3-2 is not in the parenthesis its on the outside to the left

Answer 11

Okay so I solved -3³ and I got +27

Answer 12

@Nnesha

Answer 13

no don't forget the parentheses
it's (-3)^3
not -3^3

Answer 14

Yeah the exponent

Answer 15

I already solved it

Answer 16

what did you get ?

Answer 17

I got 27 when I solved (-3³) then I subtracted 3-2 which was on the left so now I got 28 I'm not sure if its correct

Answer 18

no

Answer 19

\[\huge\rm 3-2(4+a)^3\]
substitute a for -7
\[\huge\rm 3-2(4+(-7))^3\]
\[\huge\rm 3-2(-3)^3\]
it is (-3) to the 3rd power
not -(3^3)
totally different

Answer 20

(-3)^3= -3 times -3 times -3
-3^3=-3 times 3 times 3
sign difference

Answer 21

i guess the answer is 57

Answer 22

coz 3-2(-3)^3
3-2(-27)
3+54
57

Answer 23

@Nnesha am i correct?

Answer 24

You already know.

Answer 25

Wait so I dont have to subract 3-2 ?

Answer 26

Wait never mind I got it !! :) thanks @Nnesha & @madhu.mukherjee.946

Answer 27

no

Answer 28

np

Answer 29

Can you help me with one more problem ?

Answer 30

say

Answer 31

@madhu.mukherjee.946 I'm done with math for today my brain hurts 😞 tomorrow I'll finish them

Answer 32

okay:)