15 ÷ √10 + √20 + √40 -√5 -√80
If √5 =2.236
And √10 =3.162
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15/3.162+2*2.236+2*3.162-2.236-4*5.236
= 4.743+4.472+6.324-2.236-8.944
= 4.359
Hope it helps u
= 4.743+4.472+6.324-2.236-8.944
= 4.359
Hope it helps u
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