SOLUTION: Can you help me solve this? (-4+9i)(-1-2i)

SOLUTION: Can you help me solve this? (-4+9i)(-1-2i)

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Question 971676: Can you help me solve this? (-4+9i)(-1-2i)
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Can you help me solve this? (-4+9i)(-1-2i)
It's not an equation, nothing to solve.
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Multiply them like any 2 binomials
(-4+9i)(-1-2i) = -4*(-1-2i) + 9i*(-1-2i)
= 4+8i + (-9i-18i^2)
i^2 = -1
= 4+8i + (-9i+18)
= 22 - i

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