Function Operations

f(x) = 5x - 7

g(x) = 3x + 10

Find (f + g)(x).

• 8x² + 3

• 8x + 3

• 8x - 3

• 15x² - 70

f(x) = x² - 5x - 8

g(x) = 4x² - x + 3

Find (f + g)(x).

• 5x⁴ - 6x² - 5

• 4x² + 5x + 5

• 4x² + 5x - 5

• 5x² - 6x - 5

f(x) = 5x - 7

g(x) = 3x + 10

Find (f - g)(x).

• 2x - 3

• 2x + 17

• 2x + 3

• 2x - 17

f(x) = 5x - 7

g(x) = 3x + 10

Find (g - f)(x).

• 2x - 3

• -2x + 3

• -2x + 17

• 2x - 17

f(x) = 6x - 4

g(x) = 2x - 7

Find (f ⋅ g)(x).

• 12x² + 50x - 28

• 12x² - 34x + 28

• 12x² + 28

• 12x² - 50x + 28

f(x) = 3x² - 4x + 5

g(x) = 5x - 1

Find (f ⋅ g)(x).

• 15x³ - 23x² + 29x - 5

• 15x³ - 4x - 5

• 15x³ + 4x + 5

• 15x³ + 23x² - 29x - 5

Complete the operation and evaluate.

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Perform the indicated operation and evaluate for the given value.

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Answer explanation

p(x) = 3x + 4

q(x) = 2x²

Find p(q(x))

• 10x²

• 18x² + 4

• 6x² + 4