7i(-7-5i)=

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


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

Solving
-49i + -35i2 = 0

Solving for variable 'i'.

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

Ignore the factor -7.

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 '(7 + 5i)' equal to zero and attempt to solve:

Simplifying
7 + 5i = 0

Solving
7 + 5i = 0

Move all terms containing i to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 5i = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 5i = 0 + -7
5i = 0 + -7

Combine like terms: 0 + -7 = -7
5i = -7

Divide each side by '5'.
i = -1.4

Simplifying
i = -1.4
Solution
i = {0, -1.4}

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