\frac{ 1 }{ 2 } (3+ \sqrt{ 21) }
Evaluate
\frac{\sqrt{21}+3}{2}\approx 3.791287847
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\frac{1}{2}\times 3+\frac{1}{2}\sqrt{21}
Use the distributive property to multiply \frac{1}{2} by 3+\sqrt{21}.
\frac{3}{2}+\frac{1}{2}\sqrt{21}
Multiply \frac{1}{2} and 3 to get \frac{3}{2}.
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