now wait a minute
7 x^2 - ( -x^2) = 7 x^2 + x^2 = 8 x^2
agree with -5x-6
(2x-3)(2x-3) = 4x^2-12 x + 9
now if you factor 4x^2 - 9 you get (2x-3)(2x+3)
4) Use synthetic division to find (2x^3-5x^2+7x-1)/(x-1)
Well I get a remainder of 3
2x^2 - 3 x + 4 and remainder of 3
5)Identify the vertex,axis of symmetry, and direction of opening for y=2(x+3)^2-5
Axis of symmetry is x= -3/4
yes, opens up because as |x| gets big, y gets big +
(x+3) = 0 at x = -3
That is axis of symmetry
when x = -3
y = -5
so vertex at (-3,-5)
6) write y=-4x^2+8x-1 in vertex form
y+1 = -4 x^2 + 8 x
-(y+1)/4 = x^2 - 2x
complete square by adding (-2/2)^2 to both sides
-(y+1)/4 + 1 = x^2 -2 x +1
-(y+1)/4 + 1 = (x-1)^2
(x-1)^2 = -y/4 -1/4 +4/4
(x-1)^2 = (-1/4)(y-3)
For #1-3 I have to simplify them...and for #1 would it be 8x^2-5x-6 in the book it tells me to use the FOIL method.
and for #1 would it be 8x^2-5x-6
(2x-3)(2x-3) = 4x^2-12 x + 9 <--- That is FOIL
Math - Can someone please check my answers below for accurateness? The ...
Intermediate Algebra - Am I going in the right track? 8x -1/x + 5x - 3/2x = 16x^...
Urgent Math please check - Very Important I can get someone to check these for ...
Math/Algebra - Find each sum or difference (3x^2 + 7x- 2)+ (2x^2 - 3x + 4) ...
Polynomial- Doublecheck2 - I asked this earlier, but I didn't get an answer. I'm...
Algebra II (check) - Assume that no denominator equals 0. 5x^3(7x)^2 = 5*7*7+x^3...
Algebra - Can someone check my algebra answers and help me with the problems I ...
Algebra II - Assume that no denomenator equals 0. (7x^2+3x-9)-(-x^2+8x-3) = 7x^2...
Math Check - All the directions say for these three problems is multiply and ...
Pre-algebra - Could someone please help me solve the following problems, and ...