8.04 Solving Quadratic Equations, Part 2

Maria started to solve a quadratic equation by completing the square. Her first three steps are shown. STEP 1: x2 - 18x + 77 = 0 STEP 2: x2 - 18x = -77 STEP 3: x2 - 18x + 81 = -77 + 81 Which shows STEP 4?

(x - 9)2 = 4

The discriminant of a quadratic equation is -5. Which describes the number and type of solutions of the equation?

2 complex solutions

What is the first step in solving x2 + 2x + 3 = 0 by completing the square?

Subtract 3 from each side of the equation.

When using the Quadratic Formula to solve 2 - 5x = -3x2, which can be used for the values of a, b, and c?

a = 3, b = -5, c = 2

Solve x2 + x + 5 = 0 using the Quadratic Formula. What is the solution set?

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