Function Operations

 $f\left(x\right)=9-3x$  

 $g\left(x\right)=5x-7$  
 $Find\ f\left(x\right)+g\left(x\right)$  

• 14x-10

• -8x+2

• 2x+2

• 2x-2

Given:  $f\left(x\right)=x^2+9$  

 $g\left(x\right)=x-9$  

 $Find\ \left(f-g\right)\left(x\right)$  

• x²+x+9

• x²-x+9

• x²-x

• x²-x+18

Given  $f\left(x\right)=x^{2\ }+1$   &  $g\left(x\right)=2x-5$  

 $Find\ f\left(x\right)-g\left(x\right)$  

• x²-2x+6

• -x²+2x+4

• -x²-2x-6

• x²-2x-4

 $Given\ \ f\left(x\right)=4x+8\ \ and\ \ \ g\left(x\right)=x+3$  


 $Find\ \ \ \left(f\cdot g\right)\left(x\right)$  

• 4x²+24

• 4x²+20x+24

• 4x²+12x+24

•  $4x^3+20x^2+24x$  
  

 $Given:\ f\left(x\right)=x^{3\ }-3x\ \ \ \ and\ \ \ \ g\left(x\right)=-4x+1$   $Find\ \ \ f\left(x\right)\cdot g\left(x\right)$  

• -4x³-5x²-3

• -4x³+2x²-3x

• -4x⁴+x³+12x²-3x

• -4x^4-x³+12x²⁺3x

f(n)=n²+4n
g(n)=-n-5
Find f(n)+g(n)

• n²+3n-5
• -n³+2n-7
• n³+3n-3n
• n²-3n-5

Tags

CCSS.HSA.APR.A.1

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

Tags

CCSS.HSF-BF.A.1C

When f(x) = x² + 9 and g(x) = x - 9,

find f(x) - g(x).

• x² + x + 9

• x² - x + 9

• x² - x

• x² - x + 18

Tags

CCSS.HSF-BF.A.1B

f(x)=2x + 4

g(x)=3x² - 1

Find f(x) ⋅ g(x)

• 6x⁴ + 12x³ - 4x² - 8x

• -6x³ + 12x² + 2x - 4

• 6x³ + 12x² - 2x - 4

• 5x² - 18x + 20

Tags

CCSS.HSF-BF.A.1B

f(x) = 4x + 8

g(x) = x + 3,

Find f(x) ⋅ g(x)

• 4x² + 24

• 4x² + 20x + 24

• 4x² + 12x + 24

• 4x² + 4x + 24

Tags

CCSS.HSF-BF.A.1B