SOLUTION: (2+3i)(4+5i)

Question 244817: (2+3i)(4+5i)
Found 2 solutions by College Student, MathTherapy:
Answer by College Student(505) (Show Source): You can put this solution on YOUR website!

Answer by MathTherapy(10551) (Show Source): You can put this solution on YOUR website!
(2+3i)(4+5i)

Foil the binomials:

F ------- 2 * 4 = 8

O ------- + 2 * + 5i = + 10i

I ------- + 3i * 4 = + 12i

L ------- + 3i * + 5i = = + 15(-1) = - 15

Putting them together, we get: 8 + 10i + 12i - 15

Combining like terms gives us:
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