The problem asks to multiply two complex numbers, $(2 + 5i)$ and $(3 - 2i)$.

AlgebraComplex NumbersMultiplication
2025/3/7

1. Problem Description

The problem asks to multiply two complex numbers, (2+5i)(2 + 5i) and (32i)(3 - 2i).

2. Solution Steps

We need to multiply the two complex numbers using the distributive property (FOIL method).
(a+bi)(c+di)=ac+adi+bci+bdi2(a + bi)(c + di) = ac + adi + bci + bdi^2
Recall that i2=1i^2 = -1.
First, multiply the first terms:
23=62 * 3 = 6
Second, multiply the outer terms:
2(2i)=4i2 * (-2i) = -4i
Third, multiply the inner terms:
5i3=15i5i * 3 = 15i
Fourth, multiply the last terms:
5i(2i)=10i25i * (-2i) = -10i^2
So we have:
64i+15i10i26 - 4i + 15i - 10i^2
Since i2=1i^2 = -1, we can replace 10i2-10i^2 with 10(1)=10-10 * (-1) = 10.
Then the expression becomes:
64i+15i+106 - 4i + 15i + 10
Combine the real parts: 6+10=166 + 10 = 16
Combine the imaginary parts: 4i+15i=11i-4i + 15i = 11i
So we have: 16+11i16 + 11i

3. Final Answer

16+11i16 + 11i

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