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Evaluate - b - b2 - 4ac when a = 1, b= -10, c = 9

Evaluate - b - b2 - 4ac when a = 1, b= -10, c = 9-example-1
User Syone
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1 Answer

20 votes
20 votes

Evaluate:


-b-\sqrt[]{b^2-4ac}

For a = 1, b = -10, and c = 9

Substituting:


-(-10)-\sqrt[]{(-10)^2-4(1)(9)}

Operating:


\begin{gathered} 10-\sqrt[]{100-36} \\ 10-\sqrt[]{64} \\ 10-8 \\ 2 \end{gathered}

Result: 2

User Eric Skiff
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