so I have the equation 2x^3 +3x^2 +x -5=0
when I sub in x=1/square root (y) then the answer should be 25y^3 -31y^2 +5y -4=0 but I cant seem to get that
also when I sub in x=root y, I should get 4y^3 -5y^2 +31y -25=0 but how
thank u
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so I have the equation 2x^3 +3x^2 +x -5=0
when I sub in x=1/square root (y) then the answer should be 25y^3 -31y^2 +5y -4=0 but I cant seem to get that
also when I sub in x=root y, I should get 4y^3 -5y^2 +31y -25=0 but how
thank u
If you try to manipulate using index laws, this becomes easier.
Multiply by to remove negative indices:
Shuffle terms around:
Square both sides to remove fractional indices:
Clearly , so divide by :
Shuffle terms again:
thank you so much!!! :)