Math, asked by Charu172, 1 year ago

find zeros of -x^3+x-1

Answers

Answered by nancy60

zeroes of - x^3+x-1 is
alpha + beta + gamma = -b/a
a=-1
b=0
c=1
d=-1
-b/a
=0/-1
=0
aplha beta + beta gamma + gamma alpha = c/a
=1/-1
=-1

alpha × beta × gamma = -d/a
=-1/-1
=1
so zeroes of polynomial is 0, -1, 1

nancy60: it's correct or not

Charu172: Actually, the thing is I am also getting the same answer but the book says that this polynomial has no zeros...

Charu172: I think it must be a printing mistake...

nancy60: ok

Charu172: sorry to disturb you again but on substitution, these answers are not correct

nancy60: what

Charu172: When i put x=-1,0,1... the solution is not 0... so maybe, these are not the zeros...

nancy60: I check it another time and then answer you ok

Charu172: ok!

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