(7+8i)(7-8i)=

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Solution for (7+8i)(7-8i)= equation:


Simplifying
(7 + 8i)(7 + -8i) = 0

Multiply (7 + 8i) * (7 + -8i)
(7(7 + -8i) + 8i * (7 + -8i)) = 0
((7 * 7 + -8i * 7) + 8i * (7 + -8i)) = 0
((49 + -56i) + 8i * (7 + -8i)) = 0
(49 + -56i + (7 * 8i + -8i * 8i)) = 0
(49 + -56i + (56i + -64i2)) = 0

Combine like terms: -56i + 56i = 0
(49 + 0 + -64i2) = 0
(49 + -64i2) = 0

Solving
49 + -64i2 = 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 + -64i2 = 0 + -49

Combine like terms: 49 + -49 = 0
0 + -64i2 = 0 + -49
-64i2 = 0 + -49

Combine like terms: 0 + -49 = -49
-64i2 = -49

Divide each side by '-64'.
i2 = 0.765625

Simplifying
i2 = 0.765625

Take the square root of each side:
i = {-0.875, 0.875}

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