QuestionAugust 24, 2025

Simplify: (2-4i)(3-6i) A -18-24i B 6-24i C 6-12i (D) -18-12i

Simplify: (2-4i)(3-6i) A -18-24i B 6-24i C 6-12i (D) -18-12i
Simplify: (2-4i)(3-6i)
A -18-24i
B 6-24i
C 6-12i
(D) -18-12i

Solution
3.6(305 votes)

Answer

-18-24i Explanation 1. Apply the distributive property Multiply each term in the first complex number by each term in the second: (2)(3) + (2)(-6i) + (-4i)(3) + (-4i)(-6i). 2. Simplify each multiplication Calculate: 6 - 12i - 12i + 24i^2. 3. Use i^2 = -1 Replace 24i^2 with 24(-1), resulting in 6 - 24i - 24. 4. Combine like terms Combine real parts and imaginary parts: 6 - 24 = -18 and -24i.

Explanation

1. Apply the distributive property<br /> Multiply each term in the first complex number by each term in the second: $(2)(3) + (2)(-6i) + (-4i)(3) + (-4i)(-6i)$.<br />2. Simplify each multiplication<br /> Calculate: $6 - 12i - 12i + 24i^2$.<br />3. Use $i^2 = -1$<br /> Replace $24i^2$ with $24(-1)$, resulting in $6 - 24i - 24$.<br />4. Combine like terms<br /> Combine real parts and imaginary parts: $6 - 24 = -18$ and $-24i$.
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