ok sorry every 1,

but im really stressin out math is so hard 4 me

simplifying fractions

4x^2y there is a line under this prob

14xy^2

n wut about simplest form for 18 over 36?

so sorry i hope u can help me :( :confused:

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- March 4th 2007, 02:30 PMdiamond1simplify fraction
ok sorry every 1,

but im really stressin out math is so hard 4 me

simplifying fractions

4x^2y there is a line under this prob

14xy^2

n wut about simplest form for 18 over 36?

so sorry i hope u can help me :( :confused: - March 4th 2007, 03:02 PMJhevon
you realize that x^2 is x*x right?

do you know the laws of exponents?

for example, that x^m/x^n = x^(m-n) ?

anyway, we do this by a method we call "cancelling", actually i dont know if that's the official name for it, but hey.

so when we are given a rational function (a function that is a fraction, as in one function over another), we look what we can*cancel*in the functions by finding common factors.

so given (4x^2y)/(14xy^2)

we see that we have x's in the top as well as the bottom, we have y's in the top as well as the bottom, and we have multiples of 2 in the top as well as the bottom.

we cancel by dividing the common factors (in this case: 2, x, and y) into what we can to simplify.

we say 2 into 4 goes 2 times, so we cross out the 4 and write 2, at the same time, we say 2 into 14 goes 7 times, so we cross out the 14 and write 7. similarly we say x into x^2 goes x times and x into x goes 1 time. so we cross out the exponent 2 on the x in the top and cross out the x in the bottom completely, and so on. below is what it looks like when we do it. a similar process is used to simplify 18/36 - March 4th 2007, 03:41 PMdiamond1thanx
thanx alot

- March 4th 2007, 03:47 PMJhevon