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charle [14.2K]
3 years ago
6

Rút gọn : (x+2)^2+(3-x)^2= ?

Mathematics
1 answer:
Yanka [14]3 years ago
6 0

Step-by-step explanation:

=x^2+2x+4+9-6x+x^2

=2x^2-4x+13

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Malcolm and Ravi raced each other.
Alona [7]

Answer: v1 = 200 km/h

v2 = 320 km/h

Malcolm's maximum speed was 200 km/h.

Ravi's maximum speed was 320 km/h.

Step-by-step explanation:

8 0
2 years ago
6<br> Answer the following questions about this figure.<br> If mZ1= 53°, what is mZ3?
Scrat [10]

Answer:

143 degrees

Step-by-step explanation:

Triangle EDF is a right triangle and we know that angle 1 is equal to 53 degrees. So, angle 2 is equal to 180-90-53 = 37 degrees. Now that we want to find angle 3, we subtract the measure of angle 2 (which is 37) from 180. That gives us 143 degrees.

5 0
2 years ago
Describe the location of the point having the following coordinates. negative abscissa, zero ordinate between Quadrant II and Qu
Marianna [84]

Answer:

The location of the point is between Quadrant II and Quadrant III

Step-by-step explanation:

we know that

The abscissa refers to the x-axis  and ordinate refers to the y-axis

so

in this problem we have

the coordinates of the point are (-x,0)

see the attached figure to better understand the problem

The location of the point is between Quadrant II and Quadrant III

6 0
3 years ago
Albert wants to show that tan(theta)sin(theta)+cos(theta)=sec(theta). He writes the following proof:
Nataly_w [17]
We have that
<span>tan(theta)sin(theta)+cos(theta)=sec(theta)
</span><span>[sin(theta)/cos(theta)] sin(theta)+cos(theta)=sec(theta)
</span>[sin²<span>(theta)/cos(theta)]+cos(theta)=sec(theta)

</span><span>the next step in this proof
is </span>write cos(theta)=cos²<span>(theta)/cos(theta) to find a common denominator
so

</span>[sin²(theta)/cos(theta)]+[cos²(theta)/cos(theta)]=sec(theta)<span>

</span>{[sin²(theta)+cos²(theta)]/cos(theta)}=sec(theta)<span>

remember that 
</span>sin²(theta)+cos²(theta)=1
{[sin²(theta)+cos²(theta)]/cos(theta)}------------> 1/cos(theta)
and 
1/cos(theta)=sec(theta)-------------> is ok

the answer is the option <span>B.)
He should write cos(theta)=cos^2(theta)/cos(theta) to find a common denominator.</span>
6 0
3 years ago
Read 2 more answers
What is the simplest form of this expression?<br> 4(y + 2) - 2
Semenov [28]
The simplest form is 4y+6?


you distribute the 4 to everything in the parentheses and then combine like terms so you would combine the 8 and -2
6 0
3 years ago
Read 2 more answers
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