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Step-by-step explanation:
4√20 + 1/2 × √245 - √405
= 8√5 + 7/2 × √5 - 9√5
= -1√5 + 7/2 × √5
= 5√5 / 2
Hope it helps!
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Answer:
4*2√5 + 1/2 * 7√5 - 9√5
8√5 + 7√5/2 - 9√5
16√5 + 7√5 - 18√5/2
23√5 - 18√5/2
5√5/2
hope its help u
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