Maths, Addmaths and Statistics: Post your doubts here!

[Bilal Khan]

Guys can someone tell me how you would solve this:
Factorise: 2x^2+3x-20 I can never factorise these kind of questions. I know it is an expansion, if someone has a good link to notes, please send me the link and explain. thanks

http://www.purplemath.com/modules/factquad.htm

 

[Bilal Khan]

Guys can someone tell me how you would solve this:
Factorise: 2x^2+3x-20 I can never factorise these kind of questions. I know it is an expansion, if someone has a good link to notes, please send me the link and explain. thanks

do u want me to explain u if u are not getting it???

 

[zainabkhann]

f-1(x)=cube root of (y+4)

Could you tell me how you did it, i know you let x be y, and then solve it but for this question i need someones help

 

[zainabkhann]

do u want me to explain u if u are not getting it???

Yes please explain, and thankyou for the link and the solution to that answer, I dont get how someone can just quickly solve a factorising question and i have to sit there understand what im supposed to do :/

 

[Bilal Khan]

Could you tell me how you did it, i know you let x be y, and then solve it but for this question i need someones help

first make x the subject of the equation.
then replace y with x.
simple.

 

[Bilal Khan]

Yes please explain, and thankyou for the link and the solution to that answer, I dont get how someone can just quickly solve a factorising question and i have to sit there understand what im supposed to do :/

haven't u studied factorisation of quadratic equations??

 

[Bilal Khan]

Yes please explain, and thankyou for the link and the solution to that answer, I dont get how someone can just quickly solve a factorising question and i have to sit there understand what im supposed to do :/

welcome zainab.

 

[Bilal Khan]

Yes please explain, and thankyou for the link and the solution to that answer, I dont get how someone can just quickly solve a factorising question and i have to sit there understand what im supposed to do :/

contact me at https://www.facebook.com/mbk8596

 

[zainabkhann]

u have to make factors.this is the answer.i solved it.

I have looked at ur solution, and i get the second last and last parts, i just dont get how u got 8x and 5x :/

 

[zainabkhann]

contact me at https://www.facebook.com/mbk8596

Dont have facebook.

 

[Bilal Khan]

I have looked at ur solution, and i get the second last and last parts, i just dont get how u got 8x and 5x :/

i have to go zainab.i will tell u later.see ya.

 

[zainabkhann]

haven't u studied factorisation of quadratic equations??

No i was in another country and i moved so my studies got disturbed.

 

[zainabkhann]

i have to go zainab.i will tell u later.see ya.

Cool no problem

 

[zainabkhann]

I found this website very helpful for people who dont have a clue about factorising quadratics! just like myself http://www.mathsisfun.com/algebra/factoring-quadratics.html Do tell me if it helps anyone

 

[Minato112]

zainabkhann: U still having problems with the transformations?

 

[Bilal Khan]

I have looked at ur solution, and i get the second last and last parts, i just dont get how u got 8x and 5x :/

u have to multiply -20 with the coefficient of x which is 2.
u will get -40.

now make factors of 40.
8x5=40 , so 8x-5x as it is -40.

 

[Bilal Khan]

No i was in another country and i moved so my studies got disturbed.

in which another country???
u need any help,inform me without any hesitation.

 

[zainabkhann]

zainabkhann: U still having problems with the transformations?

I havent tried solving the questions yet, will tell you when i start doing em

 

[Minato112]

I havent tried solving the questions yet, will tell you when i start doing em

Okii... I'll help anytimee

 

[zainabkhann]

u have to multiply -20 with the coefficient of x which is 2.
u will get -40.

now make factors of 40.
8x5=40 , so 8x-5x as it is -40.

Yeah i understood how to factorise with the help of that website that i mentioned. If u have a link to some factorising questions for olevels that u could send me , then that would be great