(7+5i)(7-5i)=74

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Solution for (7+5i)(7-5i)=74 equation:


Simplifying
(7 + 5i)(7 + -5i) = 74

Multiply (7 + 5i) * (7 + -5i)
(7(7 + -5i) + 5i * (7 + -5i)) = 74
((7 * 7 + -5i * 7) + 5i * (7 + -5i)) = 74
((49 + -35i) + 5i * (7 + -5i)) = 74
(49 + -35i + (7 * 5i + -5i * 5i)) = 74
(49 + -35i + (35i + -25i2)) = 74

Combine like terms: -35i + 35i = 0
(49 + 0 + -25i2) = 74
(49 + -25i2) = 74

Solving
49 + -25i2 = 74

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 + -25i2 = 74 + -49

Combine like terms: 49 + -49 = 0
0 + -25i2 = 74 + -49
-25i2 = 74 + -49

Combine like terms: 74 + -49 = 25
-25i2 = 25

Divide each side by '-25'.
i2 = -1

Simplifying
i2 = -1

Reorder the terms:
1 + i2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + i2 = 0

The solution to this equation could not be determined.

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