(7i+7)(-3i+8)=

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Solution for (7i+7)(-3i+8)= equation:


Simplifying
(7i + 7)(-3i + 8) = 0

Reorder the terms:
(7 + 7i)(-3i + 8) = 0

Reorder the terms:
(7 + 7i)(8 + -3i) = 0

Multiply (7 + 7i) * (8 + -3i)
(7(8 + -3i) + 7i * (8 + -3i)) = 0
((8 * 7 + -3i * 7) + 7i * (8 + -3i)) = 0
((56 + -21i) + 7i * (8 + -3i)) = 0
(56 + -21i + (8 * 7i + -3i * 7i)) = 0
(56 + -21i + (56i + -21i2)) = 0

Combine like terms: -21i + 56i = 35i
(56 + 35i + -21i2) = 0

Solving
56 + 35i + -21i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '7'.
7(8 + 5i + -3i2) = 0

Factor a trinomial.
7((8 + -3i)(1 + i)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(8 + -3i)' equal to zero and attempt to solve: Simplifying 8 + -3i = 0 Solving 8 + -3i = 0 Move all terms containing i to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -3i = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3i = 0 + -8 -3i = 0 + -8 Combine like terms: 0 + -8 = -8 -3i = -8 Divide each side by '-3'. i = 2.666666667 Simplifying i = 2.666666667

Subproblem 2

Set the factor '(1 + i)' equal to zero and attempt to solve: Simplifying 1 + i = 0 Solving 1 + i = 0 Move all terms containing i to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + i = 0 + -1 Combine like terms: 1 + -1 = 0 0 + i = 0 + -1 i = 0 + -1 Combine like terms: 0 + -1 = -1 i = -1 Simplifying i = -1

Solution

i = {2.666666667, -1}

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