Math, asked by bala23718, 1 year ago

answer the 37question

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mehersangram100: yaa

bala23718: no I think answer is opt d

jaqueskallis: ok wait

mehersangram100: no chance

jaqueskallis: I'll check it again

mehersangram100: okay...find out the square of (2-root3)........it is 7-4root3

mehersangram100: so ans is 2-root3

jaqueskallis: i got it

jaqueskallis: yes it is 2- root3

mehersangram100: good....very good

Answers

Answered by mehersangram100

7-4root3=4+3-2*2root3=(2-root3)^2

so ans is 2-root3

bala23718: but it is root 7

mehersangram100: yaa

mehersangram100: root(7-4root3)=2-root3

bala23718: but it is 4 root 3 it cannot sub 7

mehersangram100: 4root3=2*2*root3

Answered by jaqueskallis

root (7-4root3)

root (4+3-4root3)

root [(2)^2 + (root3)^2 - 2.2. root3]

This is a^2 + b^2 +2ab which is equal to (a+b)^2

Therefore,

root [(2-root3)^2]

2 - root3

Therefore answer is option A

mehersangram100: hey....this is wrong

jaqueskallis: now i think so it is correct

jaqueskallis: Hope it helps

mehersangram100: yaaaa.........

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