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RSB [31]
3 years ago
5

How would I solve (-2-2i)(-4-3i)(7+8i)

Mathematics
2 answers:
AlexFokin [52]3 years ago
8 0
(-2-2i)(-4-3i)(7+8i)= \\\\ =(8+6i+8i+6i^2)(7+8i)=\\\\ =(6i^2+14i+8)(7+8i)= \\\\ =42i^2+98i+56+48i^3+112^2+64i= \\\\ =\boxed{48i^3+154i^2+162i+56}
grin007 [14]3 years ago
3 0
(-2-2i)(-4-3i)(7+8i)=\\
(-2-2i)(-28-32i-21i+24)=\\
(-2-2i)(-4-53i)=\\
8+106i+8i-106=\\
-98+114i

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does somebody knows how to do this one?
vlada-n [284]

Answer:

Step-by-step explanation:

To find the area subtract the area of the semicircle from the area of the rectangle.

Although the line isn’t there, if you imagine there is one, then you will see that you form a rectangle which is the same line as the semicircle’s diameter.

The area of rectangle is:

⇒ A = lw

⇒ A = (14)(8)

⇒ A = 112cm^{2}

The area of the semicircle;

⇒ A = \frac{1}{2}\pi r^{2}

⇒ A = \frac{1}{2}\pi (7)^{2}

*Note here that the radius is half the diameter, so it is 7cm, not 14cm

⇒ A = 76.97cm^{2}

Finally subtract the two areas;

⇒ A = 112 - 76.97

⇒ A = 35.03cm^{2}

6 0
2 years ago
I am a quadrilateral with 2 pairs of opposite sides that are parallel, 2 pairs of sides that are of equal length,and 4 right ang
Ludmilka [50]

Answer:

Rectangle

Step-by-step explanation:

The shape is of a rectangle who has got two pairs of opposite sides that are parallel and two pairs of sides that are of equal length of each other with all  the four right angles that makes up total angle of 360 degrees in total. It can be acquired that the area which is equal to length multiply by breadth.

Calculation,

A length of the rectangle is equal to each other,

Assuming it to be 3cm,

Breadth of it is equal to each other,

Assuming that to be 2cm,

Length x Breadth = Area

3 x 2 = 6cm to the power 2.

5 0
4 years ago
Blake scored 182 points in 14 games. Find the unit rate, in points per game.
antiseptic1488 [7]
13p/g

Explanation:
If he has 182p in 14g then he got 13 points per game or 13p/g
182p/14g = 13

Hope this helps!
6 0
3 years ago
Which expression is equivalent to (3x² + 3x - 3) - (6x² - 4x - 2)?
Marat540 [252]

Answer:

A. 12x^{4} -4x^{3} +3x^{2} +3x+20

Step-by-step explanation:

For this problem, we have to combine like terms.

Let's look at the equation:

(12x^{4} -4x^{3} +7x+6)+(3x^{2} -4x+14)

12x^{4, -4x^{3}, 3x^{2} do not have any other like terms, so we keep all in the final answer.

7x and -4x are like terms, so we combine them. 7x-4x=3x

14 and 6 are like terms, so we combine them. 14+6 = 20

Let's put everything into the final equation:

12x^{4} -4x^{3} +3x^{2} +3x+20

So, the final answer is A. 12x^{4} -4x^{3} +3x^{2} +3x+20

Hope this helps! If you have any questions about my work, leave them in the comments below!

5 0
2 years ago
Elvate 5-3(X-1) when X=7
USPshnik [31]

If x = 7 we just substitute all the x's by seven, so our equation stays like this:

5 - 3(7 - 1)


Now we solve it:

5 - 3(7 - 1) =

5 - 3(6) =

5 - 18 =

-13


Hope it helped,


BioTeacher101


6 0
4 years ago
Read 2 more answers
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