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Eva8 [605]
3 years ago
8

Dose anyone know how to solve this?

Mathematics
2 answers:
Reil [10]3 years ago
6 0

Answer:

  1. 3x³-6x²
  2. 3x²+x-2
  3. -16

Step-by-step explanation:

For 1: Multiply both functions together, expand, then simplify

(x-2)(3x²) = 3x³-6x²

For 2: Just add both functions together

For 3: Subtract both functions to get -3x²+x-2 and substitute x with -2

-3(-2)²-2-2 = -16

Yuliya22 [10]3 years ago
3 0

Answer:

f(x) = x - 2\\g(x) = 3x^2\\(f \cdot g)(x) = f(g(x))

             =f(3x^2) \\= (3x^2) - 2 \\= 3x^2 - 2

(f+g)(x) = f(x) + g(x)

              =(x-2) + (3x^2)\\= 3x^2 + x - 2

(f-g)(-2) = f(-2) - g(-2)

                 = ((-2) - 2) - ( 3 (-2)^2)\\=(-2-2) - (3 \times 4)\\=-4-12\\=-16

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