hi, i've got and i've got it down to if i move the -40k across i get and the answer is
but if i move the 109 across and make it i get shouldn't it be the same whicever way i do it? what am i doing wrong?
thanks
Mark
It would help if you posted the question rather than diving into what you've done and leaving us all to guess.
I assume the question asks you to find the set of values of k for which has real solutions.
which is consistent with the first answer.
Your mistake was not reversing the inequality sign when multiplying or dividing by a negative number.
ahhh, i didn't know you had to do that. yeah sorry about lack of info. so its reversed if there's a negative number involved in division or multiplication. are there any exceptions? like double negatives? i suppose its unlikely that a double negative division would be an exception because that actually was the case in the question i just posted