Identify the choice that best completes the statement or answers the question.

1. Solve 2x ^ 2 + 4x + 2 = 0 by graphing the corresponding function and determining the zeros.

a. x = 1 x-1

b. x = - 1 x = - 1

c. x-0,x--1

d. x = 1, x = - 1

2. Solve x ^ 2 - x - 6 = 0 by factoring.

a. x x = 2

b. x = 2, x = - 3

c. x = - 3 x = - 2

d. x = 3x = - 2

3. Solve 2x ^ 2 + 9x - 5 = 0 by factoring.

a. x = - 0.5, x = 5

b. x=0.5. x = - 5

c. x = 2 x = 9

d. There are no solutions.

4. Solve 12x ^ 2 + 11x = - 2 by graphing the expressions on both sides of the equation.

a. x = 2x = 4

b. x = - 0.667 x = - 0.25

c. x = 0.667 x = 0.25

d. x = - 2 x = - 4

5. Solve 4x ^ 2 + 4x - 5 = 0 using the quadratic formula.

a. x = - 2.76 , x = - 5.22

b. x = - 0.72 x = 1.72

c. x = 0.72 x = - 1.72

d. There are no solutions.

1 answer

b. x = - 0.72 x = 1.72