Question

efetue as operações:a)√75-2√12+√27b)√12-9√3+√75c)√98-√18-5√32d)5√180+√245-17√5

Answer 1

a)√75-2√12+√27
=5√3 - 2*2√3 + 3√27
=5√3 - 4√3 + 3√3
=(5-4+3)√3
=4√3

b)√12-9√3+√75
=2√3 -9√3 + 5√3
=(2-9+5)√3
=-2√3

c)√98-√18-5√32
=7√2 - 3√2 -5*4√2
=7√2 - 3√2 -20√2
=(7-3-20)√2
=-16√2

d)5√180+√245-17√5
=5*6√5 + 7√5 - 17√5
=30√5+7√5-17√5
=(30+7-17)√5
=20√5