(3i)(7+3i)-(5i)(5+7i)=

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Solution for (3i)(7+3i)-(5i)(5+7i)= equation:


Simplifying
(3i)(7 + 3i) + -1(5i)(5 + 7i) = 0

Remove parenthesis around (3i)
3i(7 + 3i) + -1(5i)(5 + 7i) = 0
(7 * 3i + 3i * 3i) + -1(5i)(5 + 7i) = 0
(21i + 9i2) + -1(5i)(5 + 7i) = 0

Remove parenthesis around (5i)
21i + 9i2 + -1 * 5i(5 + 7i) = 0

Multiply -1 * 5
21i + 9i2 + -5i(5 + 7i) = 0
21i + 9i2 + (5 * -5i + 7i * -5i) = 0
21i + 9i2 + (-25i + -35i2) = 0

Reorder the terms:
21i + -25i + 9i2 + -35i2 = 0

Combine like terms: 21i + -25i = -4i
-4i + 9i2 + -35i2 = 0

Combine like terms: 9i2 + -35i2 = -26i2
-4i + -26i2 = 0

Solving
-4i + -26i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '-2i'.
-2i(2 + 13i) = 0

Ignore the factor -2.

Subproblem 1

Set the factor 'i' equal to zero and attempt to solve: Simplifying i = 0 Solving i = 0 Move all terms containing i to the left, all other terms to the right. Simplifying i = 0

Subproblem 2

Set the factor '(2 + 13i)' equal to zero and attempt to solve: Simplifying 2 + 13i = 0 Solving 2 + 13i = 0 Move all terms containing i to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 13i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 13i = 0 + -2 13i = 0 + -2 Combine like terms: 0 + -2 = -2 13i = -2 Divide each side by '13'. i = -0.1538461538 Simplifying i = -0.1538461538

Solution

i = {0, -0.1538461538}

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