Help with GCSE Algebra question!! Would be really appreciated!

  • 0 votes

The Question is:

Show that                                             

 9 + 11  =     28                     simplifies to 9x ²+ 29 x - 28 = 0

     x+2       x ( x+2)     

  

Posted Sat 21st May, 2011 @ 12:29 by Miranda

6 Answers

  • 2 votes

heres what you do:

1. MAKE IT =0

9+(11/x+2) -28/[x(x+2)] = 0

2. multiply by the brackets

9(x+2)(x) +11(x) -28 = 0

3. expand the brackets

9x^2 +18x +11x - 28 =0

4. simplify 

9x^2 +29x-28=o

BAMMMM

Answered Sat 21st May, 2011 @ 12:42 by Georgina
  • 1 vote

could you rewrite it because im sure 9+11 doesnt =28 **

Answered Sat 21st May, 2011 @ 12:31 by Georgina
  • 0 votes

Its an algebraic question and it's impossible to type it as a fraction on here but it should be

9 + 11                 28

    _____ ( over)  _________

     x + 2            x ( x + 2)

Answered Sat 21st May, 2011 @ 12:37 by Miranda
  • 0 votes

Ohh and show that it simplifies to 9 x ( sqaured) + 29 x -28 = 0 :) x

Answered Sat 21st May, 2011 @ 12:38 by Miranda
  • 0 votes

Ahh thank you very much!! Really helped ! :)

Answered Sat 21st May, 2011 @ 12:47 by Miranda
  • 0 votes

its alright x

ive got some maths resources on that sorta stuff x

Answered Sat 21st May, 2011 @ 12:53 by Georgina