What is the simplest form of this expression?

Question

anonymous · Answer

$$y ^{2} (-4^{2} - 7)-2y ^{2}$$

anonymous · Answer

Distribute $y^2$ into the parenthesis:

$y^2 \times -4^2$

$y^2 \times -7$

Tell me what you get

anonymous · Answer

Wait, we should simplify the parenthesis first.

What's -4 * -4?

anonymous · Answer

16

anonymous · Answer

correct

anonymous · Answer

Yes, so we have:

$y^2(16 - 7) - 2y^2$

Now subtract 16 -7

anonymous · Answer

Can you subtract 16 - 7? @CaseyCarns

anonymous · Answer

after you subtract you have your answer.

anonymous · Answer

Yeah but I'm writing all of this down so just give me a second

anonymous · Answer

Okay :)

anonymous · Answer

i gtg so XD dont ask me 2 do stuff, i wont be able 2 reply

anonymous · Answer

okay so now we have $$y ^{2}(9)-2y ^{2}$$

anonymous · Answer

That looks wrong

anonymous · Answer

That's correct, now multiply $y^2 \times 9$

anonymous · Answer

$$9y ^{2}$$

anonymous · Answer

Yes, now we have:

$9y^2 - 2y^2$

Just combine like terms

anonymous · Answer

Actually I think we're doing something wrong..hold on.

anonymous · Answer

I don't think I'm supposed to solve it I'm just supposed to simplify

anonymous · Answer

Yes, that's what we're doing..it's impossible to solve..

anonymous · Answer

Am I doing this right? @hartnn

hartnn · Answer

please post the correct question :)
doesn't seem like a valid question..

can you post a screenshot of your question?

anonymous · Answer

attachment

anonymous · Answer

Ah, you missed the 'y' in $-4^2$

hartnn · Answer

y^2 **

anonymous · Answer

Ohhh I got in trouble for posting screenshots so I type out the problems now

anonymous · Answer

$y^2(-4y^2 - 7) - 2y^4$

Okay, now we distribute $y^2$ into the parenthesis..

$y^2 \times -4y^2$

$y^2 \times -7$

anonymous · Answer

$$-3y ^{4}-7y ^{2}-2y ^{4}$$

anonymous · Answer

@iGreen.

anonymous · Answer

Not quite..

$y^2 \times -4y^2 \ne -3y^4$

'-3' is incorrect..but $y^4$ is correct.

anonymous · Answer

Okay so what do we do next

anonymous · Answer

Multiply $y^2 \times -4y^2$ again..

anonymous · Answer

$$-4y ^{4}$$

anonymous · Answer

Yes, so we have:

$-4y ^{4}-7y ^{2}-2y ^{4}$

Now combine:

$-4y^4 - 2y^4$

anonymous · Answer

$$8y ^{8}$$

anonymous · Answer

Not quite, check again.

anonymous · Answer

$$-2y ^{4}$$

anonymous · Answer

Yes, so our fully simplified form is:

$-2y^4 - 7y^2$

anonymous · Answer

@CaseyCarns

anonymous · Answer

I says it's wrong