Apply the Distributive Property to show  3i[(2i)+(−3i−5)]  in its simplest form.(1 point)

1 answer

To simplify the expression \( 3i[(2i) + (-3i - 5)] \) using the Distributive Property, we follow these steps:

  1. First, simplify the expression inside the brackets: \[ (2i) + (-3i - 5) = 2i - 3i - 5 = -i - 5. \]

  2. Substitute this back into the expression: \[ 3i[-i - 5]. \]

  3. Now apply the Distributive Property: \[ 3i \cdot (-i) + 3i \cdot (-5). \]

  4. Calculate each term:

    • For \( 3i \cdot (-i) \): \[ 3i \cdot (-i) = -3i^2. \] Since \( i^2 = -1 \), this becomes: \[ -3(-1) = 3. \]
    • For \( 3i \cdot (-5) \): \[ 3i \cdot (-5) = -15i. \]
  5. Combine the results: \[ 3 - 15i. \]

Therefore, the expression \( 3i[(2i) + (-3i - 5)] \) in its simplest form is: \[ \boxed{3 - 15i}. \]