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Solve the expanded polynomial in standard form.

A. -x³ + 5x - 7
B. -x³ + 7x - 7
C. -x³ - x - 7
D. -x³ + 6x - 7

1 Answer

2 votes

Final answer:

The question deals with solving a quadratic equation using the quadratic formula. Identifying the coefficients from the equation and substituting into the formula will yield solutions for x. After solving, verification is essential for accuracy.

Step-by-step explanation:

The subject of this question involves solving a quadratic equation, a concept frequently encountered in algebra. The quadratic equation provided in the question is x² + 0.0211x - 0.0211 = 0. To solve this equation, one can use the quadratic formula, which is applicable to any equation of the form ax² + bx + c = 0. In this formula, a, b, and c are coefficients from the equation, and x represents the variable to be solved for.

First, we identify the coefficients a = 1, b = 0.0211, and c = -0.0211. Substituting these values into the quadratic formula, x = [-b ± √(b² - 4ac)] / (2a), we can solve for the variable x. After solving, it's important to check the answer to ensure that it's reasonable and accurate.

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