1.

\left. \begin array l \frac ( 3 \cdot 473 %2B 598 ) ^ 2 %2B ( 3 \cdot 473 - .598 ) ^ 2 3.473 \times 3 \cdot 473 %2B .598 \times .598 = ? \\ ( a ) 4.071 \end array \right.

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