Maths AS Core 1 Help!!!!!

Scroll to see replies

Reply 20

username2203937

and yes i can
-2 +or- 2(root)2

Reply 21

Zacken

Original post by ButtersIsStuck

oh so i was sort of right at that point

Can you quote me next time so I get a notification? :smile:

I think you were right, you just forget to divide by 2 for both terms on the numerator or you forget to include brackets when you typed it up here. Either way, no problem. Anyways, how can you simplify

\frac{\sqrt{32}}{2}

Reply 22

JD1lla

Original post by Zacken

Indeed, so you have

\displaystyle x = \frac{-6 \pm \sqrt{32}}{2} = -3 \pm \frac{\sqrt{32}}{2}

. Can you simplify that surd a bit? :smile:

Why is it plus/minus for both surds?

Reply 23

Zacken

Original post by ButtersIsStuck

and yes i can
-2 +or- 2(root)2

6/2 = 3

Reply 24

Zacken

Original post by JD1lla

Why is it plus/minus for both surds?

Uh, because of the quadratic formula? You've got two roots.

Reply 25

username2203937

Original post by Zacken

Uh, because of the quadratic formula? You've got two roots.

ok so im sort of lost zacken not gonna lie

Reply 26

JD1lla

Original post by Zacken

Uh, because of the quadratic formula? You've got two roots.

Ah, misread your post.

I thought you wrote down each roots, BOTH with plus/minus, which would indicate four roots. My mistake.

OP, you can eliminate any fractions in you answer.

Reply 27

username2203937

Original post by Zacken

6/2 = 3

oh yes sorry, i get that thats just a silly error

Reply 28

username2203937

Original post by ButtersIsStuck

ok so im sort of lost zacken not gonna lie

so, its -3 +or- 2(roor)2, yes?

Reply 29

Zacken

Original post by ButtersIsStuck

so, its -3 +or- 2(roor)2, yes?

Correct!

Reply 30

username2203937

Original post by Zacken

Correct!

thank you so much zacken, much appreciated. now i got to do the next 5, "sigh"

Reply 31

Zacken

Original post by ButtersIsStuck

thank you so much zacken, much appreciated. now i got to do the next 5, "sigh"

Feel free to post the question and answer here if you want me to check your answer! :smile:

Reply 32

username2203937

Original post by Zacken

Feel free to post the question and answer here if you want me to check your answer! :smile:

will do did the link to my question booklet work and also are you doing a-levels or are you at degree level

Reply 33

Zacken

Original post by ButtersIsStuck

will do did the link to my question booklet work and also are you doing a-levels or are you at degree level

I haven't checked it out, but probably!

Still A-Level, but hopefully degree level by this time next year! :biggrin:

How are you finding Maths so far? :smile:

Reply 34

username2203937

Original post by Zacken

I haven't checked it out, but probably!

Still A-Level, but hopefully degree level by this time next year! :biggrin:

How are you finding Maths so far? :smile:

ohhh so youre a2, nice. yeh we started with the a* gcse questions to make sure we know that. (e.g. for me at gcse there were always 2 horrible algebra questions which no one got). and now were doing proper **** and its difficult, as my teachers arent great and i havent done maths for like 8 weeks. so yeh im not finding maths the greatest but i will push myself through the 2 years as i do enjoy it when i understand and get used to it. if that makes sense