What is the sum of the roots of x^2 - 4x - 5 = 0?

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Multiple Choice

What is the sum of the roots of x^2 - 4x - 5 = 0?

Explanation:
This question tests how the coefficients of a quadratic relate to its roots. For any quadratic ax^2 + bx + c = 0, the sum of the roots is -b/a. Here a = 1 and b = -4, so the sum is -(-4)/1 = 4. You can also factor the expression: x^2 - 4x - 5 = (x - 5)(x + 1), giving roots 5 and -1, whose sum is 4.

This question tests how the coefficients of a quadratic relate to its roots. For any quadratic ax^2 + bx + c = 0, the sum of the roots is -b/a. Here a = 1 and b = -4, so the sum is -(-4)/1 = 4. You can also factor the expression: x^2 - 4x - 5 = (x - 5)(x + 1), giving roots 5 and -1, whose sum is 4.

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