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radical 32 -5 radical 128 +6 radical 8

Răspuns :

√32-5√128+6√8=4√2-5·8√2+6·2√2=4√2-40√2+12√2=
-36√2+12√2=-24√2
√32=√(4x4x2)=2x2x√2=4√2
√128=√(4x4x4x2=2x2x2x√2=8√2
√8=√(4x2)=2√2
√32-5√128+6√8=√4²·2-5√8²·2+6√2²·2=
4√2-5·8√2+6·2√2=4√2-40√2+12√2=
-36√2+12√2=-24
√2