Question

can someone help in solving for t? t^6+4t^3=45 ......i got 5 and -9 as my answer but when i put it as my answer its saying its wrong :(

Answer 1

you should have
\[t^3=9\] or
\[t^3=-3\]

Answer 2

can you show me the steps you took to get to this please?

Answer 3

wait its saying those answers are wrong too...

Answer 4

ok maybe that was wrong. lets start at the beginning. first write
\[t^6+4t^3-45=0\] then factor as
\[(t^3+9)(t^3-5)=0\] so
\[t^3=-9\] or
\[t^3=5\] and therefore
\[t=\sqrt[3]{-9}\] or
\[t=\sqrt[3]{5}\]

Answer 5

thank you both!