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In $26-37,$ find each product.$$(1+5 i)(1+2 i)$$

$-9+7 i$

Algebra

Chapter 5

QUADRATIC FUNCTIONS AND COMPLEX NUMBERS

Section 5

Operations with Complex Numbers

Equations and Inequalities

Quadratic Functions

Complex Numbers

Polynomials

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Lectures

01:32

In mathematics, the absolu…

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01:56

In $26-37,$ find each prod…

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00:48

for this problem were asked by the complex number one plus fava by the complex number one plus two. So to do this we may use the foil method. So we 1st 1 won't spot one times one to get one and then we multiply the outer terms the two I and the one which will give us a plus two. Uh And then we will multiply the inner terms five and one to give us a plus five I And then we were multiple. The last terms which will be the five and the two I to give us plus 10 squared. Now if we attempt to add correspondent components, we have one and then we have a two and a father which combining with seven and then we have plus 10 times square. Now I squared is the square root of negative one squared, which is actually negative one. And this works out to be one mon ist tim plus seven I, which is equal to negative non plus seminar and negative non plus seven. Ah, is the final answer

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