BR#22 Add/Sub 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) = x²+9 and g(x) = x-9

Find f(x)-g(x). 

• x²+x+9

• x²-x+9

• x²-x

• x²-x+18

Given g(x) = 2x  and h(x) = −4x ² + 6x + 3
 
Find g(x) + h(x)

• -2x² + 6x + 3
• -4x² + 8x + 3
• 2x - 4x² +6x +3
• 10x² + 2x +3

Given f(n)=2n+1 and g(n)=3n

Find f(n)+g(n)

• 5n+1

• -5n+1

• -2n+1

• -6n-1

Given f(n)= n² + 4n and g(n)= -n - 5

Find f(n) + g(n)

• n²+3n-5

• -n³+2n-7

• n³+3n-3n

• n²-3n-5