if x+3 is a factor of x cube-7x square-7kx+9x then k is equals to
Anonymous:
are you sure your question is correct? check minus and plus signs once again
is it minus 9x or +9x ??
it is +9x
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Answered by
2
I hope this would hepl you
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i think u should the x=-3 not +3
But x-3 is factor so.
X-3=0
x=3
ya i know but its okay..i understand
but the ques says x+3 is factor not x-3
Oh ....my bad
Answered by
6
put the the value x=-3 in the expression.
x³-7x²-7kx+9x=0
-27-63+21k-27=0
solve the above part to get value of k
x³-7x²-7kx+9x=0
-27-63+21k-27=0
solve the above part to get value of k
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