check this | Mathematics | Page 1

glass spear Dec 25, 2022, 4:28 PM

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Sqrt(x) gives two values

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Ex: sqrt(25), while we usually say 5, can be 5 OR -5

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So for canceling the sqrt, we have to say 1 = -1 or 1

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So sqrt(x^2) = x / -x

civic isle Dec 25, 2022, 5:11 PM

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The hell

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$\sqrt{x^2} = \abs{x}$

languid sparrowBOT Dec 25, 2022, 5:11 PM

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Mizere

civic isle Dec 25, 2022, 5:11 PM

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@tribal patio

tribal patio Dec 25, 2022, 5:15 PM

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Oh

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But isn't the absolute value always positive @civic isle

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That's what I am taught

civic isle Dec 25, 2022, 5:16 PM

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Exactly

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So square root of smth is always a positive number

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$\sqrt{(-1)^2} = \abs{-1} = 1$

languid sparrowBOT Dec 25, 2022, 5:17 PM

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Mizere

tribal patio Dec 25, 2022, 5:17 PM

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But he said it could be - or +

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Ok

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Thanks

civic isle Dec 25, 2022, 5:17 PM

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tribal patio But he said it could be - or +

Idk what the hell he said, thats some bs

tribal patio Dec 25, 2022, 5:18 PM

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Are you mad

civic isle Dec 25, 2022, 5:18 PM

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Nah

tribal patio Dec 25, 2022, 5:18 PM

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Ok Merry Christmas

glass spear Dec 25, 2022, 5:18 PM

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civic isle Idk what the hell he said, thats some bs

(-5)^2 = 25 = 5^2 so sqrt(25) = + or - 5

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Thats why the +- is in the quadratic formula

civic isle Dec 25, 2022, 5:18 PM

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glass spear (-5)^2 = 25 = 5^2 so sqrt(25) = + or - 5

Yeah right no, please shhh

tribal patio Dec 25, 2022, 5:19 PM

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It's always positive because we square it first then take the square root of it

civic isle Dec 25, 2022, 5:19 PM

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languid sparrow **Mizere**

^

tribal patio Dec 25, 2022, 5:20 PM

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That's why we use it in the distance between two points formula

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Because distance can't be negative

#check this