snowystorm777
  • snowystorm777
Find the value of the expression 4a^4 − 2b^2 + 40 when a = 2 and b = 7
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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pooja195
  • pooja195
Hi welcome to openstudy ^-^ So basically plug in the numbers given \[\huge~\rm~\bf 4(2)^4-2(7)^2\]
snowystorm777
  • snowystorm777
Thanks,so it's 16-98?
pooja195
  • pooja195
hmm nope \[\huge~\rm~\bf 4^2=? \]

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More answers

snowystorm777
  • snowystorm777
Wait how did u get that?
pooja195
  • pooja195
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 =?
snowystorm777
  • snowystorm777
16
pooja195
  • pooja195
Good :) 7^2=7 x 7 =?
snowystorm777
  • snowystorm777
14
pooja195
  • pooja195
No we are multiplying 7 times 7=?
snowystorm777
  • snowystorm777
oops 49
pooja195
  • pooja195
Good :) 16 x 4=64 \[\huge~\rm~64−(2)(49)\]
snowystorm777
  • snowystorm777
I keep getting 3038 I dont know why??
pooja195
  • pooja195
49 x 2 =?
rvc
  • rvc
where r u stuck dear?
rvc
  • rvc
u got 49 correct? @snowystorm777
pooja195
  • pooja195
I'll let @rvc take over :) I dont want to confuse you
rvc
  • rvc
i would like u to wait @pooja195 till we complete :)
snowystorm777
  • snowystorm777
ok
rvc
  • rvc
|dw:1449759279142:dw|
snowystorm777
  • snowystorm777
I keep getting 3038???
snowystorm777
  • snowystorm777
U there??
rvc
  • rvc
lets do 49 X 2 first
snowystorm777
  • snowystorm777
98
rvc
  • rvc
cool now 64-98=?
snowystorm777
  • snowystorm777
-34
rvc
  • rvc
34+40 =?
snowystorm777
  • snowystorm777
74
rvc
  • rvc
see i made a mistake
rvc
  • rvc
it should be -34 isnt it?
snowystorm777
  • snowystorm777
yah I wrote -34
rvc
  • rvc
-34+40 =?
snowystorm777
  • snowystorm777
6
rvc
  • rvc
bravo thanks to pooja195 u r correct
snowystorm777
  • snowystorm777
Thanks!

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