Question

The price of a storybook is RM2 more than that of a comic book.Encik Ahamd buys x storybooks at a price of RM108.With the same amount of money,he can buy (x+9) comic books.
a)Form a quadratic equation for the price of the storybooks and comic books in terms of x and show that it can be simplified to x^2+9x-486=0

Answer 1

@ganeshie8

Answer 2

sorry if I say that price of storybook is RM108 and price of comicbook is RM106, is it right?

Answer 3

please @ganeshie8

Answer 4

or please @MARC_

Answer 5

if it is so, then we can write:
108x=106x+9*106
then x=477

Answer 6

sorry, I've made an error!

Answer 7

I got!
if we factorize your quadratic equation, we will get this:
\[x ^{2}+9x-486=(x-18)(x+27)=0\]
so the unique acceptable solution is x=18.
now from the textof your problem if I call with s the price of storybook, and c the price of comicbook, we can write;
s=c+2
then:
(c+2)*x=c*(x+9)
so:
2*x=9*c
finally inserting x=18, in the last above equation, we will get:
c=4, and s=6

Answer 8

oops c=RM4 and s=RM6

Answer 9

@MARC_