I have the question x^2-3x+4=0 and it says to solve using the quadratic formula. I got 3(plus or minus) (root)-7 all over 2. Sorry its written so poorly haha. Do I leave it in surd form for my answer as I cannot root a negative number or have I made an error? Thanks
I have the question x^2-3x+4=0 and it says to solve using the quadratic formula. I got 3(plus or minus) (root)-7 all over 2. Sorry its written so poorly haha. Do I leave it in surd form for my answer as I cannot root a negative number or have I made an error? Thanks
Is this C1 or FP1?
As written, you have not made an error.
Unless it's supposed to be x^2 - 3x - 4 = 0 or something.
I have the question x^2-3x+4=0 and it says to solve using the quadratic formula. I got 3(plus or minus) (root)-7 all over 2. Sorry its written so poorly haha. Do I leave it in surd form for my answer as I cannot root a negative number or have I made an error? Thanks
I have the question x^2-3x+4=0 and it says to solve using the quadratic formula. I got 3(plus or minus) (root)-7 all over 2. Sorry its written so poorly haha. Do I leave it in surd form for my answer as I cannot root a negative number or have I made an error? Thanks
You should get 3 (plus or minus) root -3 all over 2. Yes you do leave this as a surd because the surd is the exact number, unless the question specifies how many significant figures you leave it to
I have the question x^2-3x+4=0 and it says to solve using the quadratic formula. I got 3(plus or minus) (root)-7 all over 2. Sorry its written so poorly haha. Do I leave it in surd form for my answer as I cannot root a negative number or have I made an error? Thanks
Hmm... Assuming GCSE, that's very unusual, because you do indeed have a negative root, which means that there are no real solutions...
I think they probably just want you to say that there are "no real solutions", unless this is A-level Further Maths and you have met complex numbers...