QuestionAugust 25, 2025

Evaluate the expression for a=-2,b=8 and c=-7 b^2-4ac b^2-4ac= square (Simplify your answer.)

Evaluate the expression for a=-2,b=8 and c=-7 b^2-4ac b^2-4ac= square (Simplify your answer.)
Evaluate the expression for a=-2,b=8 and c=-7 b^2-4ac b^2-4ac= square (Simplify your answer.)

Solution
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Answer

8 Explanation 1. Substitute values into the expression Replace a, b, and c with -2, 8, and -7 respectively in b^2 - 4ac. 2. Calculate b^2 Compute 8^2 = 64. 3. Calculate 4ac Compute 4 \times (-2) \times (-7) = 56. 4. Evaluate the expression Subtract the results: 64 - 56 = 8.

Explanation

1. Substitute values into the expression<br /> Replace $a$, $b$, and $c$ with $-2$, $8$, and $-7$ respectively in $b^2 - 4ac$.<br />2. Calculate $b^2$<br /> Compute $8^2 = 64$.<br />3. Calculate $4ac$<br /> Compute $4 \times (-2) \times (-7) = 56$.<br />4. Evaluate the expression<br /> Subtract the results: $64 - 56 = 8$.
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