Question

HELP!!
FAN & MEDAL, I'll BE SO GRATEFUL!!!

Classify each quadratic by matching.

81x^2-16
8a^3-27b^3
4a^2+100
x^2-10xy+25y^2
m^3+64

Perfect square
Differences of cubes
Sum of Cubes
Difference of Squares
None of the above

Which of the following has the greatest x value for the vertex? Explain your choice.

f(x)=x^2+4x+4
f(x)=3(x-1)^2+5
f(x)=-2(x+1)^2+3
f(x)=-3x^2+12x+1

Name 3 methods that can be used to solve quadratic equations

(I put factoring, quadratic formula, & completing the square)

Answer 1

1. (9x)^2 - 4^2 =
so what is this ?

Answer 2

@emilybbydoll are you here ?

Answer 3

@jhonyy9 Im not sure what it is thats why im asking for help

Answer 4

the first one is just matching like for ex (im not saying its true)
81x^2-16 would be perfect square

Answer 5

I just need help on the first two & if you could tell me if the last one is correct?

Answer 6

so the first one i think will be difference of perfect squares - or not ?

Answer 7

the second differences of cubes

Answer 8

the first one is like this,

you have to match each one to a term

81x^2-16
8a^3-27b^3
4a^2+100
x^2-10xy+25y^2
m^3+64

Perfect square
Differences of cubes
Sum of Cubes
Difference of Squares
None of the above

It just all looks the same to me

Answer 9

the last one is sum of cubes

Answer 10

okay i see

Answer 11

what is there again ?

Answer 12

how about the 3rd and 4th one?
If its okay can you please explain to me why, it doesn't have to be intricate or anything

Answer 13

what we have so far

81x^2-16
Perfect square
8a^3-27b^3
Differences of cubes
4a^2+100
???
x^2-10xy+25y^2
???
m^3+64
Sum of Cubes

Answer 14

The two remaining terms are Difference of Squares & None of the above

Answer 15

3rd is sum of squares (2a)^2 +10^2
4th x^2 -10xy +25y^2 = (x-5y)^2

Answer 16

4th perfect square

Answer 17

ok. ?

Answer 18

help help help

Answer 19

Thank you so much! but we already used perfect square once, which one would be None of the above?

Answer 20

@jhonyy9 are you there?

Answer 21

3rd is sum of squares but this choice not is there so this will be non of above

Answer 22

okay so the fourth one would be difference squares since its the last one left?

Answer 23

@jhonyy9

Answer 24

no the 4th is a perfect square (x+5y)^2

Answer 25

difference squares is the first one

Answer 26

okay thanks for clearing that up (:
can you help me with the second one?

Answer 27

second what ? exercise ?

Answer 28

Which of the following has the greatest x value for the vertex? Explain your choice.

f(x)=x^2+4x+4
f(x)=3(x-1)^2+5
f(x)=-2(x+1)^2+3
f(x)=-3x^2+12x+1

Answer 29

yeah

Answer 30

do you know what mean greatest vertex ?

Answer 31

no please explain

Answer 32

how can you calculi vertex of a quadratic ?

Answer 33

I don't know

Answer 34

please explain to me everything it is I need to know, you've been a life saver so far

Answer 35

open this ,, http://www.virtualnerd.com/tutorials/?id=Alg1_12_01_0003 " - and here will get a very easy understandably example

Answer 36

ok ?

Answer 37

okay, sorry i lost connection.
@jhonyy9

Answer 38

can you check the last one for me? I just want to know if its correct
Name 3 methods that can be used to solve quadratic equations

(I put factoring, quadratic formula, & completing the square)