(2-i)(7-3i)=

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Solution for (2-i)(7-3i)= equation:


Simplifying
(2 + -1i)(7 + -3i) = 0

Multiply (2 + -1i) * (7 + -3i)
(2(7 + -3i) + -1i * (7 + -3i)) = 0
((7 * 2 + -3i * 2) + -1i * (7 + -3i)) = 0
((14 + -6i) + -1i * (7 + -3i)) = 0
(14 + -6i + (7 * -1i + -3i * -1i)) = 0
(14 + -6i + (-7i + 3i2)) = 0

Combine like terms: -6i + -7i = -13i
(14 + -13i + 3i2) = 0

Solving
14 + -13i + 3i2 = 0

Solving for variable 'i'.

Factor a trinomial.
(2 + -1i)(7 + -3i) = 0

Subproblem 1

Set the factor '(2 + -1i)' equal to zero and attempt to solve: Simplifying 2 + -1i = 0 Solving 2 + -1i = 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 + -1i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1i = 0 + -2 -1i = 0 + -2 Combine like terms: 0 + -2 = -2 -1i = -2 Divide each side by '-1'. i = 2 Simplifying i = 2

Subproblem 2

Set the factor '(7 + -3i)' equal to zero and attempt to solve: Simplifying 7 + -3i = 0 Solving 7 + -3i = 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 + -3i = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3i = 0 + -7 -3i = 0 + -7 Combine like terms: 0 + -7 = -7 -3i = -7 Divide each side by '-3'. i = 2.333333333 Simplifying i = 2.333333333

Solution

i = {2, 2.333333333}

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