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wolverine [178]
3 years ago
13

Expand and simplfy (x+3)(x-3)(3x+2)

Mathematics
1 answer:
tester [92]3 years ago
4 0

Answer:

{3x}^{3}  + {2x}^{2}  - 27x - 18

Step-by-step explanation:

1) Use difference of squares: a² - b² = (a + b) (a - b).

( {x}^{2}  -  {3}^{2} )(3x + 2)

2) Simplify 3² to 9.

( {x}^{2}   - 9)(3x + 2)

3) Use The FOIL method: (a + b) (c + d) = ac + ad + bc + bd.

{3x}^{3}  + {2x}^{2}  - 27x - 18

Therefor, the answer is 3x³ + 2x² + -26x -18.

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