is th is correct? | Mathematics | Page 1

dusty mesa Apr 4, 2024, 8:50 PM

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Are these the correct x intercepts?

royal pumiceBOT Apr 4, 2024, 8:50 PM

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dusty mesa Are these the correct x intercepts?

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dusty mesa Apr 4, 2024, 8:51 PM

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Sorry I meant (-2,0)

rich fractal Apr 4, 2024, 8:54 PM

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Let me check

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Also

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You can use

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Desmos

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to see

earnest quest Apr 4, 2024, 8:54 PM

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dusty mesa Are these the correct x intercepts?

No.
Also, note that (-2x^2 - 6x)(-2x - 6) is multiplication, not addition.

rich fractal Apr 4, 2024, 8:54 PM

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earnest quest No. Also, note that (-2x^2 - 6x)(-2x - 6) is multiplication, not addition.

yeah

dusty mesa Apr 4, 2024, 8:54 PM

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Wdym? Im factoring

rich fractal Apr 4, 2024, 8:55 PM

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yeah cant factor like that as i know

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its multiplication u cant change it like that

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i mean u can factor that

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But on the other line u added them

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idk how to explain lol

dusty mesa Apr 4, 2024, 8:56 PM

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Im confused

earnest quest Apr 4, 2024, 8:56 PM

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dusty mesa Wdym? Im factoring

That is grouping, not factoring.
2x^2 - 8x - 6 = (-2x^2 - 6x) + (-2x - 6)
So, you missed +.

rich fractal Apr 4, 2024, 8:56 PM

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dusty mesa Im confused

Sorry its better LordDarpinger explain lol

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Forget what im saying

dusty mesa Apr 4, 2024, 8:56 PM

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No its not that im confused

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Wdym

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When did i add

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Im doing gcf

earnest quest Apr 4, 2024, 8:56 PM

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You wrote 2x^2 - 8x - 6 = (-2x^2 - 6x)(-2x - 6). That is wrong.

dusty mesa Apr 4, 2024, 8:56 PM

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Factoring

earnest quest Apr 4, 2024, 8:57 PM

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The correct expression is 2x^2 - 8x - 6 = (-2x^2 - 6x) + (-2x - 6).

dusty mesa Apr 4, 2024, 8:57 PM

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But thats how i always write it

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Confusedp

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Il what your talking about but

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Im doing gcf

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Cryinggggp

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So the x intercepts are wrong?

earnest quest Apr 4, 2024, 9:00 PM

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Well, they are wrong, yes.

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You should've written it like this if you want to group terms.
2x^2 - 8x - 6 = (-2x^2 - 6x) + (-2x - 6) = x(-2x - 6) + (-2x - 6) = (-2x - 6)(x + 1) = -2(x + 3)(x + 1)

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And the roots are obvious from here, as is the x-coordinate of the vertex.

dusty mesa Apr 4, 2024, 9:02 PM

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Huh

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Thats doesnt make sense tho

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Im doing gcf

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Not grouping

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Im so lost rn

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Nvm ill figure it out myself

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Thanks tho

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+close

#is th is correct?