3 years ago

Please help , giving brainliest!

Mathematics

1 answer:

Digiron [165]3 years ago

6 0

Answer:

give brainliest first..

Step-by-step explanation:

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(3-4i)(-2-21) multiply

evablogger [386]

Answer:

-69 +92 i (here 'i' is imaginary value)

Step-by-step explanation:

step:-

Given (3-4 i)(-2-21)

on multiplication, we get

(3-4 i)(-2-21) = 3(-2) -3(21) - 4 i (-2) +4 i(21)

= -6 -63 + 8 i +84 i

= -69 +92 i

-69 + 92 i is a complex number.

real part x = -69

imaginary part y = 92

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4 years ago

How do you do this question with explanation included?

tatyana61 [14]

Answer:

Junita

Step-by-step explanation:

$\frac{15}{18} = 0.833$

junita scored a 83.3%

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3 years ago

a square as 9 inch sides. every side of a pentagon is also 9 inches long. are their perimeters the same? explain your answer.

WARRIOR [948]

The perimeters are not the same because a square has 4 sides if u add up all the sides you'll get 36 and a pentagon has 5 sides add up the sides you'll get 45

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4 years ago

WILL GIVE BRAINLIEST. If peter had five blueberries and then he gave 3 times five dived by 7.5 blueberries away how many blueber

Alex73 [517]

3 blueberries. It's like 5 minus 2

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3 years ago

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Simplify the expression (8+6i)(8-6i)

Amiraneli [1.4K]

Answer:

Step-by-step explanation:

$(8+6i)(8-6i)\qquad\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=8^2-(6i)^2\qquad\text{use}\ (ab)^n=a^nb^n\\\\=64-6^2i^2\qquad\text{use}\ i^2=-1\\\\=64-(36)(-1)\\\\=64+36\\\\=100$

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4 years ago

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