Combining Polynomials

When f(x) = 9-3x and g(x) = 5x-7 , find f(x)+g(x). 

• 14x-10

• -8x+2

• 2x+2

• 2x-2

f(n)=2n+1
g(n)=3n
Find f(n)+g(n)

• 5n+1

• -5n+1

• -2n+1

• -6n-1

f(n)=x²+1
g(n)=2x-5
Find f(n)-g(n)

• x²-2x+6

• -x²+2x+4

• -x²-2x-6

• x²-2x-4

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

(2x + 3)(x² + 4x + 1)

• 2x³ + 10x² + 14x + 4 

• 2x³ + 11x² + 14x + 3 

• -2x³ - 11x² + 14x + 5 

• x³ - 11x² + 14x + 3 

Find the product.

• 8x² +12x +11

• 15x⁴ +35x³ +30x²

• 15x³+12x²+11x

Select the answer that completes the box with the correct terms. The terms are listed in 1, 2, 3, 4 order as shown in the box.

(5c-2)(3c²-5c+4)

• 15c³-31c⁴+30c²-8

• 15c³-19c²+10c-8

• 15c³-31c²+30c-8

• 15c³-31c²+30c+8

• 3x³ +8x

• x³+3x² +8x

• 2x² +8x

• x³-3x³ +8x²