-6 radical din 2x= -2 radical din 90

-6√2x= -2√90
-6√2x= -2×3√10
-6√2x= -6√10 /×(-1)
6√2x=6√10 /:6
√2x=√10
x=√10/√2
x=√5
-6√2×=-2√90
-6√2×=-6√10
×=√5
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-2√3²·10
-2·3√10 (calculam produsul)
⇒ -6√10
-6√2x÷(-6√2)=-6√10÷(-6√2)
×=√5