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

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


Simplifying
(7 + -5i)(7 + 5i) = 0

Multiply (7 + -5i) * (7 + 5i)
(7(7 + 5i) + -5i * (7 + 5i)) = 0
((7 * 7 + 5i * 7) + -5i * (7 + 5i)) = 0
((49 + 35i) + -5i * (7 + 5i)) = 0
(49 + 35i + (7 * -5i + 5i * -5i)) = 0
(49 + 35i + (-35i + -25i2)) = 0

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

Solving
49 + -25i2 = 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 + -25i2 = 0 + -49

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

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

Divide each side by '-25'.
i2 = 1.96

Simplifying
i2 = 1.96

Take the square root of each side:
i = {-1.4, 1.4}

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