I'm not Chris, but I can help you with this 
First, we need to find the square roots of the 2 squares, because the squares of them will give us 32 and 63. So, the square root of 32 is \(\sqrt{32}\), which simplifies to: \(\sqrt{16} \cdot \sqrt2 \implies 4\sqrt2\).
We can use this same thing to find the square root of 63.
\(\sqrt{63} \implies \sqrt9 \cdot \sqrt7 \implies 3\sqrt7\)
So when finding the square roots, our fraction becomes \(\frac{\sqrt{32}}{\sqrt{63}}\), which using our steps makes the fraction \(\frac{4\sqrt2}{3\sqrt7}\)
To rationalize this, we need to multiply \(\sqrt7\) on both sides, so this gives us:
\(\frac{4\sqrt{2} \cdot \sqrt7}{3\sqrt7 \cdot \sqrt7} \implies \frac{4\sqrt{14}}{21}\)
That makes a=4, b=14, and c=21. Adding 4+14+21 give us \(\boxed{39}\)
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