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Virty [35]
3 years ago
5

If x = -2, calculate the value of: xcubed + xsquared

Mathematics
2 answers:
laiz [17]3 years ago
6 0
-2*-2*-2 = ?
-2*-2 = ?
-8+4= -4 
answer is -4
Elan Coil [88]3 years ago
5 0
X cubed = -8   

-2 x -2 = 4 
4 x -2 = -8

x squared = 4

-2 x -2 = 4 

-8 + 4 = -4 

xcubed +xsquared = -4
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Hey can you please help me posted picture of question
Dmitry_Shevchenko [17]
Answer:
The solutions are: 
\frac{3 + i}{2} and \frac{3 - i}{2}

Explanation:
The general form of the quadratic equation is:
ax² + bx + c = 0
The given equation is:
2x² - 6x + 5 = 0

By comparison:
a = 2
b = -6
c = 5

Now, to get the solutions of the equation, we will have to use the quadratic formula shown in the attached image.

By substituting in the formula, we would find that:
either x = \frac{6 +  \sqrt{(-6)^2 - 4(2)(5)} }{2(2)}  =  \frac{3 + i}{2}

or x = \frac{6 - \sqrt{(-6)^2 - 4(2)(5)} }{2(2)} = \frac{3 - i}{2}

Hope this helps :)

4 0
3 years ago
Are the decimals 0.4 and 0.40 equal ?explain
iren [92.7K]
Yes, because no matter how many 0's are after the decimal, the number stays the same.
6 0
3 years ago
Read 2 more answers
100 POINTS!!! Brainliest if correct, I report if the answer is absurd. Don’t answer if don’t know.
Lena [83]

Answer: D

Step-by-step explanation:

To find the perimeter of the square, you want to first find the length of each side. Since the figure is a square, we know that each side is equal to each other. We can set the expressions equal to each other to find x.

\frac{3}{4}x-1=\frac{1}{2}x+7           [subtract both sides by 1/2x]

\frac{1}{4}x-1=7                    [add both sides by 1]

\frac{1}{4}x=8                           [multiply both sides by 4]

x=32

Now that we know x, we can plug it into each expression to find teh length of each side.

\frac{3}{4}(32)-1                       [multiply]

24-1                           [subtract]

23

Now that we know each side is equal to 23, we can add all the sides together to find the perimeter.

23+23+23+23=92        or          23×4=92

Since we know that the perimeter is 92 units, the answer is D.

3 0
3 years ago
Read 2 more answers
Please help!!! ill give brainliest
yawa3891 [41]

Answer:

Step-by-step explanation:

divide the number then add on

7 0
3 years ago
Read 2 more answers
Eight times the sum of 9 and some number is 192.​
vovikov84 [41]

Answer:

15

Step-by-step explanation:

To solve this, divide 192 by 8:

192/9 = 24

Subtract 9 from 24:

24 - 9 = 15

Therefore, 8 times the sum of 9 and 15 is 192

3 0
3 years ago
Read 2 more answers
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