stimultaneous (1 Viewer)

[_kuroo]

how to solve this stimultaneous?

 

[AAEldar]

Let them equal each other, so:

 

[_kuroo]

but then what do i do with the 7x?

 

[_kuroo]

OH. stupid question. LOLS

 

[zeebobDD]

Don't they teach you simultaneous equations in year 10:S

 

[Timske]

Don't they teach you simultaneous equations in year 10:S

year 8?

 

[SpiralFlex]

year 8?

In year 5?

 

[powlmao]

Let them equal each other, so:

On my phone don't expect perfect.

Take it all to one side

X^2 + 5x - 7x + 1 - 9 = 0
x^2 - 2x - 8 = 0
(x - 4 ) ( x + 2) = 0
X = -2 and 4

 

[powlmao]

Oh. Didn't read your last post my bad

 

[_kuroo]

in my situation, i never paid attention in class, never listened, never did jackshit. but i "just" got the marks so im allowed to do extension 1 maths. i got a test tomorrow, full asking questions all over the forum. so yeah, i dont have any foundation. ROFFLWAFFL

 

[Carrotsticks]

Do you pay attention in class now?

Also if you're having trouble with simultaneous equations and algebra, you are absolutely going to hate geometry of the parabola.

 

[powlmao]

Good luck for tomorrow.

In my experience I often make stupid aglebra mistakes because I am nervous (It made me get a question wrong in my last assessment because I didn't carry the sign right)

 

[_kuroo]

oopht. mkays ill take your advise! happy attitude it is.

yeah i can tell. but im definitely studying hard, listening and staying away from my friends in class.

 

[Timske]

Gll brother

 

[zeebobDD]

In year 5?

LOL comn guys, your making him feel really stupid:L

 

[girlworld_club]

Let y = y

x^2 + 5x + 1 = 7x + 9

Move everything to LHS

x^2 + 5x + 1 -7x -9 = 0

Simplify

x^2 -2x - 8 = 0

(x - 4 )(x +2 ) = 0

x= 4 x=-2

Substitute both x's into one equation to find y