If you want to rationalize the denominator, then multiply numerator & denominator by sqrt(5), so 8*sqrt(5)/5 = approx 3.578
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0.625
if you mean X²+8X-5=0: X1=-8/2 - Square root of ((8/2)²+5) X1=-4 - Square root of 21 X1 is about -8.58 X2=-8/2 + Square root of ((8/2)²+5) X2=-4 + Square root of 21 X2 is about 0.58
8 times the square root of 5
The square root of 2 is irrational, and therefore, this equation is unsolvable.
It depends on where your parentheses were.Here are the answers to both possibilities:(the square root of 8)/27 = 2.82843/27 = 0.10476 (rounded)The square root of (8/27) = 0.54433(rounded)