TYS 'O' LVL maths question
-
got so zhun meh.. i come forum then u ask me.. haha.. my ans shld be correct ba.. cos if u expand out get back ur qn
-
Originally posted by tinuviel07:
how you know i online..
= (12bx^2-3b) + (4ax^2-a)
= 3b(4x^2-1)+a(4x^2-1) take out common factor
= (3b+a)(2x+1)(2x-1)
your answer correct ah
u can explain to me how from (4x^2-1) u change to (2x+1) (2x-1) -
Originally posted by gunner77:
u can explain to me how from (4x^2-1) u change to (2x+1) (2x-1)it's the rule
(a^2 - b^2) = (a+b)(a-b)
-
ohh i get it liao
after u take out the common factor it became
3b(4x^2-3b)+a(4x^2-1)
then--> (3b+a) (4x^2-1)
u break the (4x^2-1) into
(2x-1) ( 2x+1 )
rite?
-
yup
-
why ur maths so pro one?
wish i had ur brains.
-
haha i do tuition.. so roughly remb
-
ohh, u tuition teacher ah?
-
Originally posted by gunner77:
ohh, u tuition teacher ah?
part-time
-
ohh ok
one more question please.
solve the equation.
3(x-5)-2 = 7-(1-x)
-
Originally posted by gunner77:
ohh ok
one more question please.
solve the equation.
3(x-5)-2 = 7-(1-x)
3x-15-2=7-1+x
2x = 7-1+15+2
2x =23
x = 11.5
-
but the ans is 11.5 leh
-
type wrongly.. 15 type 12
-
ohh wow!
i make a careless mistake at the 1st step la.
aiya, i hate maths.
i already try my best but always make careless mistake tat cause me to lose marks.
somemore, some of the easy questions i take such a long time to tink.
why some of my friends can do so easily and get the distinction by paper 1 while i still struggle to pass?
-
diff ppl good at diff things?
-
ya i noe
but the o lvl require u to be good at EVERYTHING
-
dont be too hard on yourself
-
anyways thanks for all the help man!
u are great! really
are u good at chem ?
-
not too bad.. you can ask
-
so far no question la
coz i just started today
maybe a few days time i have doubts then i post
-
haha okay. i teach mainly chem tho i prefer maths.. chem nicer to earn money
-
u teach pure or combined?
-
both.. doesnt have any difference for me
-
ohh, good good.
-
one more chem pro
