help | Revision Server | Page 1

chrome linden Dec 24, 2022, 2:47 PM

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What

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Final step under Jottings

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I don’t get

dusty river Dec 24, 2022, 2:48 PM

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Well anything squared will always be greater than 0

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cause it'll always be positive

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won't ever be negative

chrome linden Dec 24, 2022, 2:49 PM

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Idk but how did they turn it into that

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From the step above

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The LHS

dusty river Dec 24, 2022, 2:49 PM

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Well x² - 2xy + y² factorises into (x - y)²

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so it's a perfect square

chrome linden Dec 24, 2022, 3:02 PM

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Howw

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I dont see

chrome linden Dec 24, 2022, 3:02 PM

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dusty river Well x² - 2xy + y² factorises into (x - y)²

How

silk sinew Dec 24, 2022, 3:03 PM

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It just does

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When u expand it u get x^2-2xy+y^2

chrome linden Dec 24, 2022, 3:05 PM

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How do i factor it thooo

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In the first place

silk sinew Dec 24, 2022, 3:06 PM

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U need to numbers that multiply to y^2 and sum to -2y

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It’s just a known perfect square

chrome linden Dec 24, 2022, 3:08 PM

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Ok

lethal lance Dec 24, 2022, 3:19 PM

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chrome linden How

expand (x-y)^2, see what u get

chrome linden Dec 24, 2022, 3:19 PM

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I get it now

delicate linden Dec 24, 2022, 4:29 PM

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Lmao

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Just am-gm inequality 🥱

#help