2 years ago

Simplify each expression, if possible. 13. (2+ 5xi)(7- xi)

Mathematics

1 answer:

vaieri [72.5K]2 years ago

4 0

Answer:

Step-by-step explanation:

(2+5xi)(7-xi)=2(7-xi)+5xi(7-xi)

=14-2xi+35xi-5x²i²

=14+33xi-5x²(-1)

=14+33xi+5x²

=14+5x²+33xi

You might be interested in

The altitude of an equilateral triangle is 5 cm. what is the length of a side of the triangle?

Grace [21]

Answer:

The length side of the triangle is $\frac{10\sqrt{3}}{3}\ cm$

Step-by-step explanation:

we know that

The equilateral triangle has three equal sides and three equal internal angles of measure of 60 degrees each.

Let

b------> the length side of the equilateral triangle

Applying Pythagoras theorem

$b^{2}=(b/2)^{2}+5^{2}\\\\ b^{2}-(b/2)^{2}=25\\\\ (3/4)b^{2}=25\\ \\b^{2} =25*4/3\\ \\b=\frac{10}{\sqrt{3}}\ cm\\ \\b=\frac{10\sqrt{3}}{3}\ cm$

3 0

3 years ago

PLEASE HELP, WILL GIVE BRAINLIEST The number of views on an interesting video after it's uploaded is represented by the followin

igomit [66]

Answer:

Step-by-step explanation:

just try

4 0

3 years ago

Read 2 more answers

Did i do this right?

Blizzard [7]

i belive you are correct

6 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%3F%7D%7B%3F%7D%20" id="TexFormula1" title=" \frac{?}{?} " alt=" \frac{?}{?} " al

DiKsa [7]

Lol cool hahahahahaha

8 0

2 years ago

Read 2 more answers

Decide which of the following numbers does not belong in the group.

scoundrel [369]

Answer:

502

Step-by-step explanation

108 has the numbers 0, 1, and 8 which added together totals 9

603 has the numbers 0, 3, and 6 which added together totals 9

360 has the numbers 0, 3, and 6 which added together totals 9

502 has the numbers 0, 2, and 5 which equal 7

502 is the odd one out

7 0

2 years ago