find x^3 +1/x^3 -9 if x^2 + 1/x^2 = 34
Answers
Answered by
1
x²+1/x² = 34
add 2 on both sides
(x+1/x)² = 6²
x+1/x = 6
cubing on both sides
x³+1/x³ +3(x+1/x) = 216
x³+1/x³ = 216-18
x³+1/x³ = 198
subtract 9 on both sides
x³+1/x³-9 = 189
please mark it as the brainliest answer
add 2 on both sides
(x+1/x)² = 6²
x+1/x = 6
cubing on both sides
x³+1/x³ +3(x+1/x) = 216
x³+1/x³ = 216-18
x³+1/x³ = 198
subtract 9 on both sides
x³+1/x³-9 = 189
please mark it as the brainliest answer
Answered by
0
I hope this will help you
pls follow me and leave a thank
and mark be as brainlist
Attachments:
savitryjaikumar:
who is correct 189 or 192
Similar questions