anonymous
  • anonymous
What is the value of the following expression when x=3 and y=-2? 4x-y2
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
DanJS
  • DanJS
can you put those values into the expression
DanJS
  • DanJS
just the order of ops thing like last time i think
anonymous
  • anonymous
@jim_thompson5910

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

jim_thompson5910
  • jim_thompson5910
The expression is this right? \[\Large 4x - y^2\]
anonymous
  • anonymous
yes!
jim_thompson5910
  • jim_thompson5910
to start off, replace every x with 3 (since x = 3) \[\Large 4\color{red}{x} - y^2\] \[\Large 4(\color{red}{3}) - y^2\]
anonymous
  • anonymous
Sorry brain fart. and I really don't know how to use this site.
jim_thompson5910
  • jim_thompson5910
Then replace every y with -2 \[\Large 4(3) - \color{red}{y}^2\] \[\Large 4(3) - (\color{red}{-2})^2\]
jim_thompson5910
  • jim_thompson5910
at this point, you either use pen/paper to compute or a calculator to compute
anonymous
  • anonymous
Well 4*3 equals 64.
jim_thompson5910
  • jim_thompson5910
4*3 does not equal 64
jim_thompson5910
  • jim_thompson5910
you might be thinking of \(\Large 4^3\)
anonymous
  • anonymous
That's what I meant. How you drew it out before kind of like \[4*4*4\]
anonymous
  • anonymous
Something like that lol
jim_thompson5910
  • jim_thompson5910
well in the case of 4*3, it's simply 4 times 3, which is 12
jim_thompson5910
  • jim_thompson5910
that's different from 4^3, which is 4 to the third power
anonymous
  • anonymous
Oh ok!
jim_thompson5910
  • jim_thompson5910
btw, 4(3) is another way of saying 4*3
anonymous
  • anonymous
Oh ok!:)
anonymous
  • anonymous
Talking about the final answer. From my calulations, its positive?
jim_thompson5910
  • jim_thompson5910
The answer is positive. Yes
anonymous
  • anonymous
I stuck between 8 and 16.
jim_thompson5910
  • jim_thompson5910
what is (-2)^2 equal to?
anonymous
  • anonymous
-4? I have a feeling that that's incorrect.
jim_thompson5910
  • jim_thompson5910
we multiply -2 by itself twice
jim_thompson5910
  • jim_thompson5910
(-2)^2 = (-2)*(-2) = ??
anonymous
  • anonymous
-8?
jim_thompson5910
  • jim_thompson5910
you were correct about the 4 part, it's just positive and not negative -2 times -2 = +4
jim_thompson5910
  • jim_thompson5910
negative times negative = positive
anonymous
  • anonymous
Oh!!!!!
jim_thompson5910
  • jim_thompson5910
\[\Large \color{red}{4(3)} - \color{blue}{(-2)^2}\] \[\Large \color{red}{12} - \color{blue}{4}\]
anonymous
  • anonymous
8
jim_thompson5910
  • jim_thompson5910
yep
anonymous
  • anonymous
Thats the final answer?
jim_thompson5910
  • jim_thompson5910
yes it is

Looking for something else?

Not the answer you are looking for? Search for more explanations.