Math, asked by kuldeep3335, 1 year ago

(2 root 5 - root 7)square

Anonymous: ___k off

Answers

Answered by wwwbansalpiyush

Hate hope it will helpful to you

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kuldeep3335: sry it is wrong answer u applied wrong property

Answered by sahasraramadugu2005

(2√5-√7)²

using identity (a-b)²=a²-2ab+b²

(2√5)²-2×2√5×√7+(√7)²

4×5-4√35+7

20+7-4√35

27-4√35

kuldeep3335: how - 4 come

sahasraramadugu2005: (a-b) ² = a²-2ab+b²

kuldeep3335: in the last step how +4come

sahasraramadugu2005: check it again I changed it

kuldeep3335: oky

kuldeep3335: solv my nxt question s

sahasraramadugu2005: ??

kuldeep3335: 2/5root7+2

kuldeep3335: Rationalize

sahasraramadugu2005: 2/5√7+2×5√7-2/5√7-2= 2(5√7-2)/(5√7)²-(2)²=10√7-4/25×7-4=10√7-4/175-4=10√7-4/171

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