3 years ago

Find the product (-5+3i)(-5-3i) (simplify and write in form a+bi)

Mathematics

1 answer:

Anon25 [30]3 years ago

8 0

Answer:

$\huge\boxed{(-5+3i)(-5-3i)=34=34+0i}$

Step-by-step explanation:

$(-5+3i)(-5-3i)$

use (a + b)(a - b) = a² - b²

$=(-5)^2-(3i)^2=25-3^2i^2=25-9i^2$

we know i² = -1. Therefore

$=25-9(-1)=25+9=34$

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