Algebra II
posted by Emily .
I honestly forgot how to do these type of problems. Can someone help me! Thanks!!

24. ( 9x^2  4 )/( 3x^2  10x  8 )
31. 2x^2 + 5 = 12x
39. Find the maximum value of g(x) = 4x^2 + 16x  15
42. Graph y9 = 2(x+3)^2

Algebra II 
Damon
( 9x^2  4 )/( 3x^2  10x  8 )
well the numerator is difference of two squares so factor
(3x2)(3x+2)
now I bet one of those is a factor of the denominator
(3x  2)(x+4) no
(3x+2)(x4) yes
so we really have
(3x+2)(3x2) / (3x+2)(x4)
which is
(3x2) / (x4) 
Algebra II 
Damon
2 x^2  12 x + 5 = 0
I can not factor that, sure it is not 11 x?
If not a typo, use quadratic equation
x = [ b +/ sqrt(b^24ac)] / 2a 
Algebra II 
Damon
g(x) = 4x^2 + 16x  15
parabola
g is  for bi + or  x so upside down (sheds water)
Find the vertex.
4 x^2  16 x + 15 = g
x^2  4 x = (g15)/4
x^2  4 x + 4 = g/4  15/4 + 16/4
(x2)^2 = (1/4) (g +1)
AT VERTEX x = 2, g = +1
so max at (2,1) 
Algebra II 
Damon
y9 = 2(x+3)^2
pretty much the same as the last one
same both sides of x = 3 so that is the vertical axis of symmetry
vertex at (3,9)
when x gets big, y gets small, so sheds water
when y = 0
9/2 = (x+3)^2
x + 3 = +/ 3 /sqrt 2
x = 3 +/ 3/sqrt 2 is where he zeros are 
Algebra II 
Damon
Just brute force think your way through these problems !!!

Algebra II 
Emily
OMG you are FREAKIN AWESOME for helping me out with these problems!!!!!! With your thorough explanations it all came back to me I thank you SOOOOOO MUCH!!!!!!

Algebra II 
Mike
6x^415x^3+10x^210x+4 divided by 3x^2+2
Please help!!!
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