Utilizeaza regulile de calcul pentru a exprima mai simplu: a)√2 ·√5·√10. B)√112 SUPRA√28,c)√147 supra√75.d)√7·√13 supra √91. e)√4·7 supra√2·√14.f)4·√5 supra3·√20.

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Răspunsuri

2014-10-02T17:22:08+03:00
A)√2 ·√5·√10=√2 ·√5 ·√2 ·√5=2 ·5=10
b) √112/√28=√28*√4/√28=√4=2
c) 
√147/√75=√3*√49/√3*√25=√49/√25=7/5
d) √7·√13/√91=√117/9
e)√4·7/√2·√14=2*7/√2*√2*√7=√7
f) 4·√5/3·√20=4*√5/3*√4*√5=4/3*2*√5=2/3*√5

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