(2-5i)(4+3i)=

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Solution for (2-5i)(4+3i)= equation: 


Simplifying
(2 + -5i)(4 + 3i) = 0

Multiply (2 + -5i) * (4 + 3i)
(2(4 + 3i) + -5i * (4 + 3i)) = 0
((4 * 2 + 3i * 2) + -5i * (4 + 3i)) = 0
((8 + 6i) + -5i * (4 + 3i)) = 0
(8 + 6i + (4 * -5i + 3i * -5i)) = 0
(8 + 6i + (-20i + -15i2)) = 0

Combine like terms: 6i + -20i = -14i
(8 + -14i + -15i2) = 0

Solving
8 + -14i + -15i2 = 0

Solving for variable 'i'.

Factor a trinomial.
(2 + -5i)(4 + 3i) = 0


Subproblem 1
Set the factor '(2 + -5i)' equal to zero and attempt to solve:

Simplifying
2 + -5i = 0

Solving
2 + -5i = 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 + -5i = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -5i = 0 + -2
-5i = 0 + -2

Combine like terms: 0 + -2 = -2
-5i = -2

Divide each side by '-5'.
i = 0.4

Simplifying
i = 0.4

Subproblem 2
Set the factor '(4 + 3i)' equal to zero and attempt to solve:

Simplifying
4 + 3i = 0

Solving
4 + 3i = 0

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

Add '-4' to each side of the equation.
4 + -4 + 3i = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 3i = 0 + -4
3i = 0 + -4

Combine like terms: 0 + -4 = -4
3i = -4

Divide each side by '3'.
i = -1.333333333

Simplifying
i = -1.333333333
Solution
i = {0.4, -1.333333333}

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