polynomials help D: (1 Viewer)

[bouncing]

this is from set 4F year 12 cambridge

(help please!)
also can someone tell me how to put spaces between words when i type into latex?

 

[Trebla]

 

[omgmynameislong]

3a+3b=3
a+b=1
a=1-b

2a^2 + ab + 2ab+ 2ab+ 4ab + 2b^2=-8
2a^2 + 2b^2 + 9ab = -8
2[(a+b)^2 -2ab] +9ab=-8
2(1-2ab)+9ab=-8
2+5ab=-8
5ab=-10
ab=-2
(1-b)b=-2
b-b^2=-2
b^2-b-2=0
(b-2)(b+1)=0

therefore b=2, a=-1

 

[bouncing]

what a stupid question
sorry for wasting your time guys ( ifigured it out after i postd !

 

[marmsie]

To put spaces in between words in <a href="http://www.codecogs.com/eqnedit.php?latex=\LaTeX" target="_blank"><img src="http://latex.codecogs.com/gif.latex?\LaTeX" title="\LaTeX" /></a>, you can use the command \text{Type in your text here}

 

[bouncing]

To put spaces in between words in , you can use the command \text{Type in your text here}

ah i see thank you!