Find the difference. Express your answer in standard form.
$\left(2+8i\right)-\left(4-i\right)$

In Exercises 29–36, simplify and write the result in standard form.

√3² − 4 ⋅ 2 ⋅ 5

Identify the real and imaginary parts of each complex number.

$-4-9i$

Identify the real and imaginary parts of each complex number.

$3+2i\sqrt3$

Write the complex number in standard form.

$\frac{9+\sqrt{-16}}{3}$

Find the sum. Express your answer in standard form.

$5\left(4+7i\right)+6\left(3-2i\right)$

Perform the indicated operation. Express your answer in standard form.

$\left(3+8i\right)^2$

Find the product. Express your answer in standard form.

$2i\left(9-4i\right)\left(6+5i\right)$

Find the product of the given complex number and its conjugate.

$4-5i$