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I'm guessing you mean:

√250 - √40/2 = √(25 x 10) - √(4x10)/2

= √25 x √10 - √4 x √10/2

= 5 √10 - 2 √10/2

= 5 √10 - √10

= 4 √10

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Wiki User

11y ago

What else can I help you with?