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55 messages · Page 1 of 1 (latest)

weary sequoia
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Something to find out √39.69
(I fine long division hard)

white schoonerBOT
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weary sequoia
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I really get stuck in finding squares of these decimal numbers

rose mason
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Aka “something to find out”

weary sequoia
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x^2 = 39.69??

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I MEAN HOW DE WO FIND OUT THAT WHAT SQUARE IS EQUAL TO 39.69

pearl verge
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how many decimal places do you need

weary sequoia
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Is there any other way except long divison

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I find it hard ngl

rose mason
# weary sequoia I MEAN HOW DE WO FIND OUT THAT WHAT SQUARE IS EQUAL TO 39.69

If you are trying to find x^2, to solve for x, take the square root of 39.69

x = √39.69

By estimation, the closest perfect squares are 6^2 = 36 and 7^2 = 49. Since 39.69 is closer to 36, the square root must be over 6. You should work your way up with a calculator by doing 6.1 x 6.1 (incorrect), 6.2 x 6.2 (incorrect), then 6.3 x 6.3 (correct) which is actually 39.69.

weary sequoia
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Oh

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Thanks bud

rose mason
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So 6.3^2 = 39.69.

weary sequoia
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Yep but this trick might fail sometimes rigjt

rose mason
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Well, yes, it may sometimes fail.

weary sequoia
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But most of the times it is effective thank you :)) i would learn long division in some time tho

rose mason
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For example if your working with non-perfect square numbers like 50, the estimate might not be accurate.

weary sequoia
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Yea

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7.1*7.1

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It should be 7.1 approx

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7.09 or something

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Yea 7.08 Approximately.

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Thanks @rose mason

drifting forumBOT
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@weary sequoia has given 1 rep to @rose mason

rose mason
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The most accurate is 7.08.

weary sequoia
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Yep

rose mason
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Actually wait

weary sequoia
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Cos if we go 7.07 it will 49.xxxx

pearl verge
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educated guess and check will work inefficiently

rose mason
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The most accurate should be 7.07.

weary sequoia
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YEAA

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49.9849

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you are right

rose mason
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My bad, yeah it wasn’t 7.08 it was 7.07

weary sequoia
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But in the questions where pi is used 7.07 and 7.08 both can be used as answer will come as approx

rose mason
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/tricks.

weary sequoia
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7.08 = 50.1264
7.07 = 49.9849

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,calc 50.1264-50

copper meteorBOT
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Result:

0.1264
weary sequoia
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,calc 50-49.9849

copper meteorBOT
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Result:

0.015099999999997
weary sequoia
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Hm

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Long divison method is hard for me 😢😞

pearl verge
rose mason
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I guess that’s about right.

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Yeah.

rose mason
weary sequoia
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For decimalds

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Thanks

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+close