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

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


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

Multiply (2 + 7i) * (8 + i)
(2(8 + i) + 7i * (8 + i)) = 0
((8 * 2 + i * 2) + 7i * (8 + i)) = 0
((16 + 2i) + 7i * (8 + i)) = 0
(16 + 2i + (8 * 7i + i * 7i)) = 0
(16 + 2i + (56i + 7i2)) = 0

Combine like terms: 2i + 56i = 58i
(16 + 58i + 7i2) = 0

Solving
16 + 58i + 7i2 = 0

Solving for variable 'i'.

Factor a trinomial.
(8 + i)(2 + 7i) = 0

Subproblem 1

Set the factor '(8 + i)' equal to zero and attempt to solve: Simplifying 8 + i = 0 Solving 8 + i = 0 Move all terms containing i to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + i = 0 + -8 Combine like terms: 8 + -8 = 0 0 + i = 0 + -8 i = 0 + -8 Combine like terms: 0 + -8 = -8 i = -8 Simplifying i = -8

Subproblem 2

Set the factor '(2 + 7i)' equal to zero and attempt to solve: Simplifying 2 + 7i = 0 Solving 2 + 7i = 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 + 7i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 7i = 0 + -2 7i = 0 + -2 Combine like terms: 0 + -2 = -2 7i = -2 Divide each side by '7'. i = -0.2857142857 Simplifying i = -0.2857142857

Solution

i = {-8, -0.2857142857}

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