hey everybody
i couldnt figure out this question from a past paper about quadratic formula
it was pretty straight foward-
the total area of rectangle R and Q is 64cm^2
calculate the value of x correct to one decimal place
5x^2+30x+24
i got 0.95 (for subtraction) and 5.05
i am jus confused on what i am suppose to choose so that the answer is 64
plus forgot what it meant by correct to one decimal place...was it rounding up? ...n also 3 significant figures....actually i m mixed up in both of them -.-
thanks
same here...but the asnwer is 1.1,
from the first part of the question i've arrived to 5x^2+30x+24
and the second part said find x correct 1 decimal place and the total area equals 64cm^2
i got the answer as 0.95 and 5.05
i was wondering if 0.95 corrected to one decimal place is 1.1, since i m confused between corrct to 1 decimal place and correct to 1 significant figure
Surely the "past paper" you got this from must have some information about "Rectangle R and Q" and what they have to do with !
As stated they don't appear to have anything to do with one another and there is no way to find "x" with just a polynomial and not an equation.
i got 0.95 (for subtraction) and 5.05
i am jus confused on what i am suppose to choose so that the answer is 64
plus forgot what it meant by correct to one decimal place...was it rounding up? ...n also 3 significant figures....actually i m mixed up in both of them -.-
thanks
. This is because a function and it's inverse cancel each other out.
means substitute the inverse of into the original . However, because these two are "opposite" functions the answer is always x.
See spoiler for examples:
Spoiler:
If you have any more questions on functions and their inverses I suggest you start a new thread