(-7-2i)(-7+2i)=

Solution for (-7-2i)(-7+2i)= equation:

Simplifying
(-7 + -2i)(-7 + 2i) = 0

Multiply (-7 + -2i) * (-7 + 2i)
(-7(-7 + 2i) + -2i * (-7 + 2i)) = 0
((-7 * -7 + 2i * -7) + -2i * (-7 + 2i)) = 0
((49 + -14i) + -2i * (-7 + 2i)) = 0
(49 + -14i + (-7 * -2i + 2i * -2i)) = 0
(49 + -14i + (14i + -4i2)) = 0

Combine like terms: -14i + 14i = 0
(49 + 0 + -4i2) = 0
(49 + -4i2) = 0

Solving
49 + -4i2 = 0

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-49' to each side of the equation.
49 + -49 + -4i2 = 0 + -49

Combine like terms: 49 + -49 = 0
0 + -4i2 = 0 + -49
-4i2 = 0 + -49

Combine like terms: 0 + -49 = -49
-4i2 = -49

Divide each side by '-4'.
i2 = 12.25

Simplifying
i2 = 12.25

Take the square root of each side:
i = {-3.5, 3.5}