Question

which is not an output for 2x squared-5?
-3
45
27
-8

Answer 1

the in/out table is obtained by the equation y = 2x^2 - 5. so if you add 5 and divide by 2 you'll get. (y+5)/2 = x^2.
now, each of those are the y's (the output of the original equation) so if you stick in those values for y and you don't get a perfect square, then that choice is correct answer.

for example, y=-3. x^2=1 perfect square. do this with the other numbers... until you don't get a perfect square.

Answer 2

He got the best medal^

Answer 3

you have the answer?

Answer 4

-8

Answer 5

I was typing it our but you had the best answer :)

Answer 6

good!... i thought what i wrote didn't make any sense... :)

Answer 7

out*

Answer 8

thanks Abbie23... :)

Answer 9

You're welcome dpalnc! :)

Answer 10

@Abbie23 , you could also put your solution down so you get a medal from me.

Answer 11

just did.. besides, there's more than 1 way to look at a problem. if the asker could not understand my method, maybe she'll understand yours... :)