Can someone please help me with these math problems and explain them? I don't know what to do.
2x-18
divided by
x squared - 16
w squared + 5w
divided by w squared - 25
y squared + 8y +15
divided by m squared - m - 42
I'm going to assume you have to simply the expressions.
1. $\displaystyle \frac{2x - 18}{x^2 - 16}$
Take common factor in the numerator. Try to factor the denominator and then cancel.
2. $\displaystyle \frac{w^2 + 5w}{w^2 - 25}$
Again, common factor numerator, factor the denominator and cancel.
3. $\displaystyle \frac{y^2 + 8y + 15}{m^2 - m - 42}$
I'm not sure what you need to do here apart from just factor both the numerator and denominator.
$\displaystyle \frac{2x-18}{x^-16}$
[tex]\frac{2x-18} factors to 2 (x+19)
x^2 -16 factors (x+4) (x-4)
2(x+9)
2 times (-9) = -18
x= 2
[tex]\frac{w^2 + sw}{w^2 -25)
(x+5) (x-5)
crossed out w+ 5 on the top and the bottom and I'm left with w divided by w-5