Question

Find the value of the expression 4a^4 − 2b^2 + 40 when a = 2 and b = 7

Answer 1

Hi welcome to openstudy ^-^
So basically plug in the numbers given

\[\huge~\rm~\bf 4(2)^4-2(7)^2\]

Answer 2

Thanks,so it's 16-98?

Answer 3

hmm nope
\[\huge~\rm~\bf 4^2=? \]

Answer 4

Wait how did u get that?

Answer 5

When we plug in the given values we get:

\[\huge~\rm~\bf 4(2)^4-2(7)^2\]
First lets get whole numbers
2 x 2 x 2 x 2 =?

Answer 6

16

Answer 7

Good :)
7^2=7 x 7 =?

Answer 8

14

Answer 9

No we are multiplying 7 times 7=?

Answer 10

oops 49

Answer 11

Good :)
16 x 4=64
\[\huge~\rm~64−(2)(49)\]

Answer 12

I keep getting 3038
I dont know why??

Answer 13

49 x 2 =?

Answer 14

where r u stuck dear?

Answer 15

u got 49
correct? @snowystorm777

Answer 16

I'll let @rvc take over :) I dont want to confuse you

Answer 17

i would like u to wait @pooja195 till we complete :)

Answer 18

ok

Answer 19

I keep getting 3038???

Answer 20

U there??

Answer 21

lets do 49 X 2 first

Answer 22

98

Answer 23

cool
now 64-98=?

Answer 24

-34

Answer 25

34+40 =?

Answer 26

74

Answer 27

see i made a mistake

Answer 28

it should be -34
isnt it?

Answer 29

yah I wrote -34

Answer 30

-34+40 =?

Answer 31

6

Answer 32

bravo
thanks to pooja195
u r correct

Answer 33

Thanks!