Alg. 2: FINAL Review #3

If f(x) = -3x and g(x) = -x + 8, which of the following expressions represent g(f(x))?

• 3x - 24
• 3x + 8
• 3x² - 24
• 3x² + 8

Solve the equation by factoring:
x²-6x+8=0

• 2, 4
• -2, -4
• -2, 4
• 2, -4

• x = 49
• x = 53
• x = 45
• x = 18

Use the quadratic formula to find the solutions for

y = 3x² + 8x - 1

• 0.1167 and -2.7833

• .7 and -16.7

• .35 and -8.35

• 0.2358 and -1.236

What is the inverse of y = 2x + 4?

• y = ( x -4)/2

• x = 2y + 4
• 2y = x - 4

Let f(x) = 9x + 8 and g(x) = 10x - 15.  Find f(x) - g(x).

• -x + 23
• x + 23
• -x - 7
• x + 7

Factor Completely:
x² - 36

• (x + 9)(x - 4)
• (x - 6)(x - 6)
• (x - 9)(x + 4)
• (x + 6)(x - 6)

Simplify.

• 10 / 14a⁴

• 21 / 49a⁴

• 3 / a⁴

• 3 / 7a⁴

Simplify.

• x+7

• x+2

• X-10

• X-7

What is the solution to x² = 2x – 5?

• {±i}
• {2 ± 2i}
• {1 ± 2i}
• {1, 2}