Operations on Functions

Given
f(x) = 3x² + 7x and g(x) = 2x² - x - 1, find (f + g)(x).

• 11x² - 1

• 5x⁴ + 6x² - 1

• 5x² + 6x - 1

• 5x² + 8x - 1

f(x) = 3x² + 7x and g(x) = 2x² - x - 1, find (f - g)(x).

• x² + 8x + 1

• x² + 6x - 1

• 5x² + 8x - 1

• x² + 8x -1

Given f(x) = 3x² - 2x + 1 and           g(x) = x - 4, find (f*g)(x).

• 3x³ - 10x² - 7x - 4

• 3x³ - 14x² + 9x - 4

• 3x² - x - 3

• 3x³ + 14x² - 9x - 4

Given f(x) = x² + 5 and g(x) = 2x³ - 1,
find (f/g)(-3).

• -14/55

• 14/55

• 2

• -2

Find f(x) - g(x)

• x² - 7x + 2

• -x² + 7x + 2

• -x² - 7x + 2

• -x² - 7x + 4

Find f(x) - g(x)

• 2x² + 8x - 8

• 3x² + 8x - 8

• 2x² + 8x + 8

• 2x² + 4x - 8

Find f(2) if f(x)= 3x-9

• 0

• 2

• 3

• -3

Find f(3) + g(2) if f(x)= x+2 and g(x)=5x-1

• 2

• 5

• 9

• 14

Find (f-g)(2)
 if f(x)=4x+10 and g(x)=3x-7

• 18

• -1

• 19

• 17