plzz answer this fast ....
Attachments:
Answers
Answered by
0
ab=2 so a=b/2
substituting a=b/2 in 3a-2b=7
3b/2 -2b = 7
3b -4b = 14
b= -14 so a= b/2 = -14/2= -7
now 27a^3 - 8b^3
27 ( -7)^3 - 8 (-14)^3
= 27 ( -343) -8 ( - 2744)
= -9261 -(- 21952)
= - 9261 + 21952
= 12691
substituting a=b/2 in 3a-2b=7
3b/2 -2b = 7
3b -4b = 14
b= -14 so a= b/2 = -14/2= -7
now 27a^3 - 8b^3
27 ( -7)^3 - 8 (-14)^3
= 27 ( -343) -8 ( - 2744)
= -9261 -(- 21952)
= - 9261 + 21952
= 12691
SpecialOperationsGuy:
thank you
Similar questions