a) √ 20=√4*5=2√5
2√5=x√5 /:√5
x=2
b) ∛40=∛8*5=2∛5
2∛5=x∛5/:∛5
c)√20=√4*5=2√5
√45=√9*5=3√5
2√5+3√5=x√5
5√5=x√5 /:√5
x=5
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a) √ 20=√4*5=2√5
2√5=x√5 /:√5
x=2
b) ∛40=∛8*5=2∛5
2∛5=x∛5/:∛5
x=2
c)√20=√4*5=2√5
√45=√9*5=3√5
2√5+3√5=x√5
5√5=x√5 /:√5
x=5