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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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2 years ago

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3 years ago

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<h3>What is algebraic expression?</h3>

A number, a variable, or a mix of numbers, variables, and operation symbols make up an expression. Two expressions joined by an equal sign form an equation. Word illustration: The product of 8 and 3. Word illustration: The product of 8 and 3 is 11

to learn more about algebraic expression refer to:

brainly.com/question/4344214

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2 years ago

What did I do wrong when finding out the sector area? I know the answer I got is wrong so can someone please help me

bonufazy [111]

I believe your mistake is that you are trying to use the sector area formula ti find arc length when there is already a formula for it.
The formula for it is
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So first substitute the values in and then simplify!
$2(10.5)\pi( \frac{118}{360} )$
Now simplify!
21 × 118 is 2478 so it's
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3 years ago