Question

va rog aujutor dau Corona si 5 stele va rog ajutatima ​

Answer 1

Răspuns:

3√20-3√45+4√5=3√4*5-4√5=3*2√5-3*3√5+4√5=3*2√5-3*3√5+4√5=6√5-9√5+5√5=

=2√5

(6-√2)^2=4-4√3+3=7-4√3

(√5-2)(√5+2)=5-4=1

(6-√2)^2-(5+√2)^2=36-12√2+2-(25-10√2+2)=36-12√2+2-25+10√2-2=11-2√2