(-6+9i)(7+i)=

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Solution for (-6+9i)(7+i)= equation:


Simplifying
(-6 + 9i)(7 + i) = 0

Multiply (-6 + 9i) * (7 + i)
(-6(7 + i) + 9i * (7 + i)) = 0
((7 * -6 + i * -6) + 9i * (7 + i)) = 0
((-42 + -6i) + 9i * (7 + i)) = 0
(-42 + -6i + (7 * 9i + i * 9i)) = 0
(-42 + -6i + (63i + 9i2)) = 0

Combine like terms: -6i + 63i = 57i
(-42 + 57i + 9i2) = 0

Solving
-42 + 57i + 9i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-14 + 19i + 3i2) = 0

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

Ignore the factor 3.

Subproblem 1

Set the factor '(-7 + -1i)' equal to zero and attempt to solve: Simplifying -7 + -1i = 0 Solving -7 + -1i = 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 + -1i = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1i = 0 + 7 -1i = 0 + 7 Combine like terms: 0 + 7 = 7 -1i = 7 Divide each side by '-1'. i = -7 Simplifying i = -7

Subproblem 2

Set the factor '(2 + -3i)' equal to zero and attempt to solve: Simplifying 2 + -3i = 0 Solving 2 + -3i = 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 + -3i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -3i = 0 + -2 -3i = 0 + -2 Combine like terms: 0 + -2 = -2 -3i = -2 Divide each side by '-3'. i = 0.6666666667 Simplifying i = 0.6666666667

Solution

i = {-7, 0.6666666667}

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