√a-2√2=?...

August 2022 1 1 Report

1) 2/√7=?
2)2/√2+1=?

3) 3-√3/2√3=?
4)a-2/√a-2√2=?

Answers & Comments

Lesben 2/√7=2.√7/√7.√7=2√7/7

2/(√2 +1)=2.(√2-1)/(√2+1)(√2-1)=2.(√2-1)/(2-1)=2(√2-1)

(3-√3)/2√3=(3-√3)√3/2√3√3=(3√3-3)/2.3=3(√3-1)/6=(√3-1)/2

(a-2)/(√a-2√2)=(a-2)(√a+2√2)/(√a-2√2)(√a+2√2)=
=(a-2)(√a+2√2)/(a-8), a≠8

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