√20 + 2√45 - √80
20 = 2 x 2 x 5 = 22 x 5, so √20 is 2√5
45 = 3 x 3 x 5 = 32 x 5 so √45 = 3√5
80 = 4 x 4 x 5 = 42 x 5, so √80 is 4√5:
After simplifying each radical:
2√5 + 2(3√5) - 4√5
2√5 + 6√5 - 4√5
Combine like terms:
(2+6-4)√5
4√5
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Antilog ((log 45)/3)
The square root of 45 in simplest form is 3sqrt(5). You take the 2 roots from 45 (5 and 9) and find out the square root of 9 is 3, while the square root of 5 is still just square root 5.
it is 6.7082
45
If 20 = 100% then 45 = 225% So, 45 is an increase of 125% on 20