Question

What is the domain of the graph of y = −2x2 − 4x + 7?

Answer 1

pleasee help me

Answer 2

-2x^2 - 4x + 7 correct?

Answer 3

yes

Answer 4

x can be all real numbers.

If you make x be 2 then the answer would be -2(2)^2 - 4(2) + 7 which equals -9 which is still a real number.

Answer 5

thank youu

Answer 6

Your welcome.

Answer 7

can you help me in another one?

Answer 8

Where does the graph of y = 6x2 − 5x − 6 cross the x-axis?

(−, 0) and (6, 0)

(, 0) and (−6, 0)

(, 0) and (−, 0)

(−, 0) and (, 0)

Answer 9

well first you need to factor them down into the form (2x + a) (3x +b) and then set that equal to zero and solve for x to get your answer.

Answer 10

can u help me do that?

Answer 11

I'm working on it.

Answer 12

thanks

Answer 13

The factored form of that is (2x - 3) (3x + 2)

Answer 14

If you set that to zero you get two equations
2x - 3 = 0
3x + 2 = 0

Solving for x we get
x = 3/2
and
x = -2/3

Answer 15

yes! okay now what?

Answer 16

Well that's the wrong answer.... first of all. erm...

Answer 17

Are you sure you have the right question? because 3/2 and -2/3 should be the answer.

Answer 18

yes thats what i got!

Answer 19

I'm sorry I don't know.