ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 unit (1 Viewer)

[Examine]

Title says all, I'll be poasting questions and I hope you could help.



You get cookies and stuff next study meat if you do.

 

[deswa1]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

The instructions said you have to add "where he'll buy everyone a cookie". I'm not helping anymore...

Jokes- I'll do my best- post away

 

[Carrotsticks]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

No cookies.

No help.

 

[Fawun]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Can I still get cookies without helping

 

[ellie95]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

No cookies.

No help.

Cookies mean peni* in hungarian lmao

 

[Carrotsticks]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Oh dear.

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Fine people get cookies if they help me at the next study meat

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

and not the hungarian type

 

[Carrotsticks]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

And by 'cookies', you mean the 'biscuit', right?

Ask away.

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

My first questions

Solve simultaneously

7/x-5/y=3 and 2/x+25/2y=12

and

9x^2+y^2=52 and xy=8

 

[RealiseNothing]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

My first questions

Solve simultaneously

7/x-5/y=3 and 2/x+25/2y=12

and

9x^2+y^2=52 and xy=8

For the second one, square the xy=8 to get (xy)^2 = 64. Then times the first equation by x^2 to get

Solve the resulting quadratic.

 

[iBibah]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

My first questions

Solve simultaneously

7/x-5/y=3 and 2/x+25/2y=12

and

9x^2+y^2=52 and xy=8

For the first one, make 5/y the subject for equation 1. Then sub into equation 2 because equation 2 is equal to 2/x+(5/2 x 5/y)=12. Solve for x then sub back in to equation 1 for y.

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

For the second one, square the xy=8 to get (xy)^2 = 64. Then times the first equation by x^2 to get

Solve the resulting quadratic.

I've reached this part, problem is I don't know how to solve it after this.

 

[iBibah]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

I've reached this part, problem is I don't know how to solve it after this.

He showed that x^2y^2=64, so replace x^2y^2 with 64 to be left with the quadratic 9x^4-52x^2+64=0. Then solve that quadratic (it's a reducible quadratic, let u=x^2)

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

He showed that x^2y^2=64, so replace x^2y^2 with 64 to be left with the quadratic 9x^4-52x^2+64=0. Then solve that quadratic (it's a reducible quadratic, let u=x^2)

Still not following (sorry if I'm being a pest)

 

[iBibah]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Still not following (sorry if I'm being a pest)

I'm latexing now...

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

I'm latexing now...

thanks

 

[Parvee]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Still not following (sorry if I'm being a pest)

9x^4-52^2+64=0
Letting u=x^2
9u^2-52u+64=0
and you can use your quadratic formula to find your u values
However u=x^2, solve for x
and sub into the original to find y

 

[iBibah]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un



Now just solve for u, then replace u with x^2 and solve for x.

 

[Examine]

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Thanks so much guys!