(-2+8i)(7+i)=0

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Solution for (-2+8i)(7+i)=0 equation:


Simplifying
(-2 + 8i)(7 + i) = 0

Multiply (-2 + 8i) * (7 + i)
(-2(7 + i) + 8i * (7 + i)) = 0
((7 * -2 + i * -2) + 8i * (7 + i)) = 0
((-14 + -2i) + 8i * (7 + i)) = 0
(-14 + -2i + (7 * 8i + i * 8i)) = 0
(-14 + -2i + (56i + 8i2)) = 0

Combine like terms: -2i + 56i = 54i
(-14 + 54i + 8i2) = 0

Solving
-14 + 54i + 8i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-7 + 27i + 4i2) = 0

Factor a trinomial.
2((-7 + -1i)(1 + -4i)) = 0

Ignore the factor 2.

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 '(1 + -4i)' equal to zero and attempt to solve: Simplifying 1 + -4i = 0 Solving 1 + -4i = 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 + -4i = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4i = 0 + -1 -4i = 0 + -1 Combine like terms: 0 + -1 = -1 -4i = -1 Divide each side by '-4'. i = 0.25 Simplifying i = 0.25

Solution

i = {-7, 0.25}

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