I suck at math!!!!

[SubSerpent]

God I hate algebra!!!:damn:

Anyone know how to do this stuff? It's been like 10+ years since I've seen this stuff!

Evaluate and Simplify the problem

x2y – 3x – y when x = -1 and y = 1

[SubSerpent]

Also, does anyone know of any good math websites where you can enter problems like these and get the answers and where it shows you how it solved the problem?

[Kapitan]

www.bbc.co.uk/bitesize (http://www.bbc.co.uk/bitesize)

[lesrae]

Substitute in the values and then do the sum:

x2y – 3x – y when x = -1 and y = 1

= (-1 * 2 * 1) - (3*-1) -1

= -2 - (-3) -1

= -2 + 3 -1

= 0

(I think)

[goldorak]

Substitute in the values and then do the sum:

x2y – 3x – y when x = -1 and y = 1

= (-1 * 2 * 1) - (3*-1) -1

= -2 - (-3) -1

= -2 + 3 -1

= 0

(I think)

Strange, by convention numerical factors are always written before the variables so x2y should really be written 2xy.
Otherwise it could be interpreted as x^2*y.

[The Noob]

@SubSerpent

I suck at math too. Badly. :p

[STEED]

What do you think calculators are for? :ping:

[jumpy]

hehe, maths? I had to take my GCSE twice - grade E 1st time, grade D second time.
Was always better at languages. :roll:

Now I have an impressive CAD program to work out all of my sums etc for drawing work. Who needs a pen and paper anymore?

Now I do something a little in line with algebra (in as much as it has alkward syntax and rules etc) but completely different:

;;; DRAWING / PLOT SETUP ROUTINE FOR ******** DRAWINGS 1:100 @A0
;;; SETS LIMITS AND LOCKED VPORT IN PSPACE WITH CORRECT PLOTTING
;;; SETTINGS BEFORE PROMPTING USER TO SAVEAS.
;;; CREATED BY **** **** : 10/10/06.


(DEFUN C:A0-100 ()
;; SWITCH TO M/SPACE
(COMMAND "TILEMODE" "1")
(COMMAND "ZOOM" "E")

;; SWITCH TO P/SPACE
(COMMAND "TILEMODE" "0")

;; P/SPACE SETTINGS
(COMMAND "LIMITS" "0,0" "1189,841")
(COMMAND "GRID" "ON")
(COMMAND "ZOOM" "E")
(COMMAND "LAYER" "MAKE" "_VPORT" "")
(COMMAND "VPORTS" "0,0" "1189,841")
(COMMAND ".MSPACE" "ZOOM" "E")
(COMMAND "ZOOM" "1/100XP" ".PSPACE")
(COMMAND "REGENALL")

;;PLOT SETTINGS
(COMMAND "-PLOT" "Y" "LAYOUT1"
"\\\\ukleifile02\\HPCL30" "OVERSIZE: ISO A0"
"MILLIMETERS" "LANDSCAPE" "NO" "EXTENTS"
"1:1" "CENTER" "NO" "."
"NO" "NO" "YES" "NO"
"NO" "YES" "NO"
)

;; LOCK VPORT
(COMMAND "VPORTS" "LOCK" "ON" "ALL" "")
(COMMAND "ZOOM" "E")
(COMMAND "LAYER" "SET" "0" "FREEZE" "_VPORT" "LOCK" "_VPORT" "")
(COMMAND "REGENALL")

;; FINAL
(INITDIA)
(COMMAND "SAVEAS")

(PRINC)

)

;; END DEFUN
It's fairly basic for CAD programing, but I'm getting there oh so slowly :rock: if you don't hear from me it's because I'm 'Lost In Stupid Parentheses' :arrgh!:

[ASWnut101]

Yes, its defenatly 0, no doubt about it.