#a level rationalising

37 messages · Page 1 of 1 (latest)

lavish hawk Sep 5, 2024, 9:09 PM

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Question 4

lapis root Sep 5, 2024, 9:14 PM

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lavish hawk Question 4

times top and bottom by root5 +1

lavish hawk Sep 5, 2024, 9:18 PM

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lapis root times top and bottom by root5 +1

I did this but idk if I’m doing it right

lapis root Sep 5, 2024, 9:18 PM

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lavish hawk I did this but idk if I’m doing it right

where are you stuck

lavish hawk Sep 5, 2024, 9:18 PM

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lavish hawk Sep 5, 2024, 9:18 PM

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lapis root where are you stuck

How to get into the form

lapis root Sep 5, 2024, 9:18 PM

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Ok

lapis root Sep 5, 2024, 9:19 PM

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U expanded

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The denominator wrong

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It should be -2root5

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not -root5

lavish hawk Sep 5, 2024, 9:19 PM

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Ohhh yeh I see

lapis root Sep 5, 2024, 9:19 PM

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Idk how u r expanding

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Even numerator

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first u do

lavish hawk Sep 5, 2024, 9:20 PM

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I just got confused because of the surds I understand now

lapis root Sep 5, 2024, 9:20 PM

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3root5

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ok

lavish hawk Sep 5, 2024, 9:20 PM

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Let me
Try again

lavish hawk Sep 5, 2024, 9:24 PM

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Is this right now

lapis root Sep 5, 2024, 9:24 PM

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lavish hawk Is this right now

No

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-2root5 x root 5

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is -10

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the root 5 x root 5 is 5

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And then u times by -2

lavish hawk Sep 5, 2024, 9:28 PM

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So I expanded the denominator right?

lapis root Sep 5, 2024, 9:28 PM

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lavish hawk So I expanded the denominator right?

5+1=6 not 4

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But Yh

lavish hawk Sep 5, 2024, 9:28 PM

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Oops I’m tired😭

lavish hawk Sep 5, 2024, 9:56 PM

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I got this

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Idk awhat to do after tho

lapis root Sep 5, 2024, 10:00 PM

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lavish hawk Idk awhat to do after tho

Do it again

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From there

lavish hawk Sep 5, 2024, 10:23 PM

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lapis root Sep 5, 2024, 10:29 PM

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about 7 x 2root5

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Icl just check solution bank if it’s taking u this long

lavish hawk Sep 5, 2024, 10:32 PM

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I didn’t know I could check that