Question

упростите выражение √20 + √45 - √180

Answer 1

√20 + √45 - √180 = √5*2*2 + √5*3*3 - √5*2*2*3*3 = 2√5 + 3√5 - 6√5 = -√5

Answer 2

$sqrt{20}+sqrt{45}-sqrt{180}=sqrt{5*4}+sqrt{9*5}-sqrt{9*5*4}=2sqrt5+3sqrt5-\-6sqrt5=-sqrt5$