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26 Feb 13
19:42
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Date Joined:
04 Jan 08
Hi, just started re-studying maths and struggling with a couple of questions. Probably basis stuff for you maths guru's!
First one is: solve the equation for x
x + 5 - 8 = 0
x x-1
From this i get
(x-1)(x+5)-8x = 0
multiplying out the brackets I get
x(squared) + 5x - x -5 -8x = 0
giving me
x(squared) -4x -5 = 0
then factorise (i cant seem to factorise this)
is this correct? If not could anyone please offer any help, its driving me beserk!
First one is: solve the equation for x
x + 5 - 8 = 0
x x-1
From this i get
(x-1)(x+5)-8x = 0
multiplying out the brackets I get
x(squared) + 5x - x -5 -8x = 0
giving me
x(squared) -4x -5 = 0
then factorise (i cant seem to factorise this)
is this correct? If not could anyone please offer any help, its driving me beserk!
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the x-1 should be under the 8
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(x-5)(x+1)=0
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thanks lily
so therefore x=+5 or x = -1 is that right? |
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yes
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cheers guys, thats a great help, seems so easy when i look at it now!
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